Artificiallift refers to the use of artificial means to increase the flow of liquids, such as crude ... by injecting gas into the liquid some distance down the well. Artificiallift is needed in wells when there is insufficient pressure in the reservoir to lift the produced fluids to the surface, but often ... an artificiallift plan to continue or increase production. Most water producing wells, by contrast, will need artificiallift from the very beginning of production because they do not benefit ... cost of these systems is similar to other types of artificiallift when appropriately designed, bearing ... the motor to the surface control panel. ESP is a very versatile artificiallift method and can .... Gas Lift Gas lift is another widely used artificiallift method. As the name denotes, gas is injected ... of the amount of fluid the pump needs. See also Plunger lift References http www.slb.com content services artificial index.asp Schlumberger Page on ArtificialLift Accessed Jan 24 2007 Petroleum ... www.sensornet.co.uk download.cfm?casestudy id 37&type casestudy ArtificialLift Optimisation Case ... lift method, though this differes for the different types of hydraulic pumps, and also when ... rates from 200 to convert 90000 oilbbl m3 per day and lift requirements from virtually zero to 10,000 ft 3,000 m of lift . They can be modified to handle contaminants commonly found in oil, aggressive ... lift can be deployed in a wide range of well conditions from convert 30000 oilbbl d m3 d abbr ... of workover is minimum. Gas lifted wells are equipped with side pocket mandrels and gas lift injection valves. This arrangement allows a deeper gas injection in the tubing. The gas lift system ... can be triggered by the gas lift. PCP Progressive cavity pump Progressing Cavity Pumps , PCP, are also ... and its main purpose is to gather fluids from beneath it and lift them to the surface. The most ... against the harder carbon steel is its 100 resistance to corrosion . Piston Plunger lift Plunger ... more details
Wiktionary liftLift may mean Lift force , a mechanical force generated by an object moving through a fluid Lift soaring , rising air used by soaring birds and glider, hang glider and paraglider pilots for soaring flight Lift soft drink , a brand of carbonated beverage produced and marketed by the Coca Cola Company Lift data mining , a measure of the performance of a model at segmenting the population ... in which the traveller tries to get a lift or ride from another traveller Plastic surgery , surgery to lift the skin Rhytidectomy or face lift , a type of plastic surgery Mastopexy or breast lift , a type of plastic surgery TOC right Physical devices Elevator or lift, a device used for raising and lowering people or goods Rack lift , a type of elevator Ski lift , an aerial or surface lift for uphill ... into space Wheelchair lift also called a platform lift , a powered device to assist a person in a wheelchair in passing a vertical barrier Sling lift also called a Hoyer Lift , mobile lift, ceiling lift, or patient lift , a manual or powered lift or hoist to assist a caregiver in transferring ... the ride height Body lift , an adaptation of fixed height to lift the automobile body from the frame Suspension lift , a modification raising the suspension of the automobile Media London International Festival of Theatre LIFT De Lift The Lift , a 1983 horror film by Dick Maas In music Lift band , a German rock band Lift Audio Adrenaline album Lift Audio Adrenaline album 2001 Lift Love and Rockets album Lift Love and Rockets album 1998 Lift Poets of the Fall song Lift Poets of the Fall song , a 2004 single Lift Sister Hazel album Lift Sister Hazel album 2004 Lift Shannon Noll album Lift Shannon Noll album 2005 Lift Shannon Noll song Lift Shannon Noll song Lift , an unreleased List of Radiohead songs song by Radiohead Retake or lift, a symbol used in musical notation Mathematics Homotopy lifting property , in mathematics, a unique path over a map Lift mathematics , a morphism h from ... more details
Unreferenced date February 2008 Gas lift is one of a number of processes used to artificially lift Petroleum oil or water from wells where there is insufficient reservoir pressure to produce the well. The process involves injecting gas through the tubing casing Annulus oil well annulus . Injected gas aerates the fluid to reduce its density the formation pressure is then able to lift the oil column and forces the fluid out of the wellbore. Gas may be injected continuously or intermittently, depending on the producing characteristics of the well and the arrangement of the gas lift equipment. Image Gaslift.jpg right frame Gas lift is a form of artificiallift where gas bubbles lift the oil from the well. The amount of gas to be injected to maximize oil production varies based on well conditions and geometries. Too much or too little injected gas will result in less than maximum production. Generally, the optimal amount of injected gas is determined by well tests, where the rate of injection is varied and liquid production oil and perhaps water is measured. Although the gas is recovered from ... in order to raise the pressure of the gas to a level where it can be re injected. The gas lift mandrel is a device installed in the tubing string of a gas lift well onto which or into which a gas lift valve is fitted. There are two common types of mandrels. In a conventional gas lift mandrel, a gas lift valve is installed as the tubing is placed in the well. Thus, to replace or repair the valve ... to repair or replace the valve. A gas lift valve is a device installed on or in a gas lift mandrel, which in turn is put on the production tubing of a gas lift well. Tubing and casing pressures cause ... the fluid to rise to the surface. In the lexicon of the industry, gas lift mandrels are said to be tubing ... gas lift mandrel. Other typical examples of equipment also used in connection with gas lift production ... pump Submersible pump Petroleum Industry Category Petroleum production af Borrelpomp id Gas lift ... more details
Lift and strike may refer to Lift and strike Bosnia Lift and strike , an American policy proposal during the Bosnian War Lift and strike welding A movement in the game of hurling disambig ... more details
Artificial chromosome may refer to Yeast artificial chromosome Bacterial artificial chromosome Human artificial chromosome P1 derived artificial chromosome disambig Long comment to avoid being listed on short pages ... more details
File Principle of plunger lift.jpg thumb 300px The stages of operation of a plunger lift. A plunger lift is an artificiallift method of gas well deliquification deliquifying a natural gas well . A plunger is used to remove contaminants from productive natural gas wells, such as water in liquid, mist, or ice forms , sand, oil and wax. The basics of the plunger is to open and close the well shutoff valve at the optimum times, to bring up the plunger and the contaminants and maximize natural gas production. A well without a deliquification technique will stop flowing or slow down and become a non productive well, long before a properly deliquified well. ref http blogs.mail.ru mail v sh38 ref The plunger lift has low energy cost, low environmental impact, low capital investment and low maintenance cost. Modern wellhead controllers offer a variety of criteria to control the plunger . The original controllers were just timers, with fixed open and close cycles. Measuring the various pressures in the system allows intelligent and reactive control. The pressures often measured are casing, tubing, line, and differential DP . The other items measured are plunger arrival times, flow rates, temperature s and status of various auxiliary equipment oil tank level, Gas compressor compressor status. Open Well Criteria Plunger Drop Timer Minimum close time to allow the Plunger to reach the bottom. Tube Line Pressure Casing Line Pressure Casing Tubing Pressure Load Ratio Casing Tubing Casing Line Foss and Gaul Equation ref Foss, D.L., and Gaul, R.B., Plunger Lift Performance Criteria with Operating ... Notes references References Lea, James F., Dynamic Analysis of Plunger Lift Operations , Journal of Petroleum ... ll plungerlift.pdf USA Government Plunger Lift Manual pdf cite book last Lea first James title Gas ... location Amsterdam year 2007 isbn 0750682701 cite book last Takacs first Gabor title Gas Lift Manual ... on the Medvezhie gas field on the basis of plunger lift at a final stage of the field development ... more details
Artificial Paradise may refer to Artificial Paradise The Guess Who album Artificial Paradise The Guess Who album , 1973 Artificial Paradise Sylvan album Artificial Paradise Sylvan album Artificial Paradise film Artificial Paradise film , a 1990 Yugoslavian film disambiguation nl Artificial Paradise ... more details
Artificial or fake trees could refer to Artificial Christmas tree s Artificial trees used to Carbon dioxide air capture Artificial trees capture carbon dioxide disambig ... more details
Static lift can refer to For an aerostat Buoyancy the lifting force of the gas For an aerodyne Lift force the lifting force generated by the wings Lift soaring rising air used by soaring birds and gliders See also Dynamic soaring disambig ... more details
Orphan date August 2009 Wikify date August 2009 LIFT Productions an acronym for Louisiana Institute of Film ..., at the urging of LIFT founders Malcolm Petal and John J Anderson, Louisiana passed a first in the nation incentive program to compete directly with Canada. LIFT quickly leveraged those incentives ... films, music videos, and commercials. During its first five years of operation, LIFT was responsible for well over a billion dollars in production. By 2007 LIFT had spread throughout the State of Louisiana ... Bureau of Investigation agents raided LIFT s offices, making sweeping accusations of fraud, money ... or abuse at LIFT. CEO and Founder Malcolm Petal pled guilty in an unrelated bribery case. By that time, though, LIFT was a defunct organization. Its creditors continue to sue the State of Louisiana which refuses to honor tax incentives promised to LIFT, despite the fact that LIFT was cleared of any ... Development. ref Early days LIFT was a Production House formed by New Orleans attorney Malcolm Petal ... of several incentive packages proposed by the LIFT founders on June 1, 2002. That same month LIFT officially opened its doors. During its early days LIFT concentrated primarily on music videos and commercials. Through its partnership with HSI Productions of California, LIFT produced a continuous stream ... archive 2006 09 2006 09 05 voa21.cfm ref n Expanding business LIFT had initially made low budget ... Story , and the critically acclaimed mini series Elvis , which earned Emmy nominations for LIFT Founders Malcolm Petal and John J Anderson. By the end of 2004, LIFT had over 500 employees on payroll ... Film Festival. That year, LIFT had produced almost 75,000,000 in locally financed production and was on track to double that in 2005 with more than 30 productions. ref LIFT Relocation and Expansion ... LIFT continued to expand the scope of its distribution outlets, releasing Mr. Brooks , starring ... are factored in. Hurricane Katrina LIFT had nine productions either actively shooting, or preparing ... more details
The lift coefficient math c mathrm l , , math math c mathrm a , math or math c mathrm z math is a dimensionless coefficient that relates the Lift force lift generated by a lift ing body, the dynamic pressure ... is a foil fluid mechanics foil or a complete foil bearing body such as a fixed wing aircraft . Lift coefficient is also used to refer to the dynamic lift characteristics of a two dimensional foil ..., Albert E. Theory of Wing Sections . Section 1.2 ref Lift coefficient may be described as the ratio of lift pressure to dynamic pressure where lift pressure is the ratio of lift to reference area. Lift coefficient may be used to relate the total Lift force lift generated by a foil equipped craft to the total area of the foil. In this application the lift coefficient is called the aircraft or planform lift coefficient math C mathrm L , . math br Watercraft and automobiles equipped with fixed foils can also be assigned a lift coefficient. The lift coefficient math C mathrm L , math is equal to ref ... 2 rho v 2A frac 2 L rho v 2A frac L q A math br where math L , math is the Lift force lift force , math ... , and math A , math is planform area. The lift coefficient is a dimensionless number . The aircraft lift coefficient can be approximated using the Lifting line theory ref Clancy, L. J. Aerodynamics ... lift coefficient Image Lift curve.svg thumb 300px right A typical curve showing section lift coefficient versus angle of attack for a cambered airfoil Lift coefficient may also be used as a characteristic ... lift coefficient math c mathrm l , . math It is common to show, for a particular airfoil section, the relationship between section lift coefficient and angle of attack . ref Abbott, Ira H., and Von ... between section lift coefficient and drag coefficient . The section lift coefficient is based ..., the lift of which is bereft of any three dimensional effects. It is not relevant to define the section lift coefficient in terms of total lift and total area because they are infinitely large. Rather ... more details
File Leas Lift 2 .JPG thumb Leas Lift 2 Originally installed in 1885, in Folkestone , Kent, the Grade II Listed Leas Lift is a funicular railway which carries passengers between the seafront and the promenade ... news uk england kent 10758519 Coastal water lift on Folkestone cliffs reopened ref The lift operates ... Leas Lift Community Interest Company http www.leasliftfolkestone.co.uk index.php?page functionality How the Lift Works ref It has carried more than 50 million people since it opened ref The Grand ... energy efficient. The lift has a very small carbon footprint as it emits no pollution and recycles all of the water used to drive the cars. ref The Folkestone Leas Lift Community Interest Company http ... that the lift was too expensive to run. ref BBC News http www.bbc.co.uk news uk england kent 10758519 Coastal water lift on Folkestone cliffs reopened ref Campaigners subsequently protested against the closure of the lift and in April 2010, it was announced that the lift was to be restored. ref BBC News http news.bbc.co.uk 1 hi england kent 8604318.stm Coastal water lift on Folkestone cliffs ... News 2011 3 21 Restored Folkestone Step Lift Carriage comes home Photos Restored Folkestone Step Lift ... Lift restoration, was appointed as lead consultant to provide structural engineering design. ref Crofton Design http crofton design.co.uk webapp 1164478 Leas Lift Leas Lift ref Crofton won the Building ... Excellence Awards in June 2011 for their work on the lift. ref ICE http www.theconstructionindex.co.uk press view 07 07 2011 engineer crofton scoops another award for restoration of leas lift folkestone kent Engineer Crofton scoops another award for restoration of Leas Lift, Folkestone, Kent ... the lift at the top and bottom stations. The wheel bearings on the lift cars were all found to be damaged ... view 10 01 2011 crofton restores grade ii listed leas lift to former glory Crofton restores Grade II Listed Leas Lift to former glory ref Present day 125 years after it first opened, the operation ... more details
MID LIFT also mid lift is a design and installation of a Rocker arm on the internal combustion engine, of an Over Head Valve OHV design. The MID LIFT principle became known as a term within a US Patent, 4,365,785, issued to Jim Miller in 1982, also referred to as the MID LIFT Patent . MID LIFT is also a Registered Trademark with regard to its use in promoting the products and educating their use as designed within this sector. Specifically, MID LIFT refers to the half lift point of motion, of the engine s valve, where all angular dimensions for determining the rocker arm s pivot points are measured to establish a perpendicular relationship on both sides of the rocker arm with the valve and push rod, respectively. It covers both a design concept of the rocker arm itself, and equally important, the application of that product in use within the internal combustion engine. It is most specifically clear about the definition of what is used to avoid over arcing and under arcing . Other theories of rocker arm design exist, some dating back more than a century, whereby these other variations use different angles of reference taken from different points of valve lift, or no specific valve lift, to determine the overall design with the push rod and the valve . Unfortunately, people believe MID LIFT is a theory or that it is designed to reduce friction neither is true, even though it is true friction is reduced. But that was not the aim. The aim was to standardize geometry so that cam analysis would be equal from one test to another, and maximum CAM information was translated throughout the valve lift cycle not merely a snap shot at full lift as most companies and engine builders test for with the inaccurate reference to ratio. Ratio is a moving target with all brands not designed to MID LIFT principles, because ratio in effect, changes, with different geometry settings mounting pivot point heights . References Unreferenced date October 2007 references references Category Engine ... more details
Multiple issues orphan February 2012 cleanup March 2008 unreferenced June 2011 Asymmetry of lift describes an aspect of the nature of aerodynamic lift generation by the helicopter rotor rotor blades of a helicopter . Image Autorotational regions.jpg thumb Overhead view of helicopter rotors. The rotor tips travel much faster than the inner sections, so produce more lift. For the purposes of this article, the demarcated circular regions are irrelevant and should be ignored. The phenomenon is most easily envisaged when a helicopter is hover ing, that is, maintaining a fixed position above a fixed point, and with no wind in the atmosphere. A helicopter rotor blade is an airfoil aerofoil , acting like the wing on an aeroplane being driven through the air to create lift. In the case of a fixed wing aircraft in normal flight, the entire wing travels forward through the air at the same speed. In the case of helicopter rotor blades, the tips of the blade travel very fast through the air a high angular velocity while the parts near the rotor hub travel much more slowly. Because lift increases with speed, the outermost sections of the rotor blades generate more lift than those parts closer to the rotor hub. So a rotor blade is said to be an aysmmetric generator of lift , because of the difference in lift generated along its length. Helicopter manufacturers try to reduce this differential effect that is, aim for more equality of lift along the blade length . This has two main aspects tapering a blade toward its tip, which reduces its surface area, in turn reducing its lift twisting the blade commonly called geometric twist so that the blade root near the hub presents a higher angle of attack, thus higher lift. When the helicopter is travelling forwards with respect to the atmosphere, a further phenomenon comes into play, dissymmetry of lift . References Reflist Category Aerodynamics ... more details
Wikify date February 2010 Image Spectacle Lift.jpg thumb right 250px Spectacle Lift Recovery Truck Spectacle lift refers to the equipment used on a type of specialist breakdown recovery vehicle. The name spectacle lift is because the wheel grids resemble a pair of spectacles when in their raised position as observed from the rear of the vehicle. Spectacle lift recovery vehicles have been very popular with vehicle recovery operators for many years due to their versatility. The spectacle lift is able to remove the casualty vehicle with speed. Spectacle lift vehicles are used for breakdown assistance as there is ample stowage space for diagnostic equipment and mechanical tools required to repair a vehicle. Most spectacle lifts are hydraulically operated and able to lift in excess of 1900 kg suitable for cars and light commercial vehicles. The spectacle lift works by lifting the drive axle off the ground so that no mechanical damage is caused to the casualty vehicle. See also Tow truck Vehicle recovery External links http www.recoveryworld.co.uk Recovery World http www.towtalk.net Towing and Recovery Forums http www.beechesrecovery.co.uk Car Recovery Service http www.trukuk.com Manufacturer of Spectacle Lifts http www.lordsrecovery.co.uk Car Recovery Service Police Contractor Category Emergency vehicles Category Car classifications Category Emergency road services auto stub de Abschleppbrille ... more details
Unreferenced date July 2009 A lift jet is a jet engine angled to provide an aircraft with aerostatic i.e. not requiring the movement of air over an airfoil lift force lift instead of or in addition to thrust. On a fixed wing aircraft, lift jets may be installed as auxiliary engines, with a separate engine to provide forward thrust, or, as in the Harrier jump jet , may be thrust vectoring vectored in flight to provide both. File RollsRoyceRB108.JPG thumb A dedicated lift jet the Rolls Royce RB108 Lift jets were first designed by Germany German engineers during World War II , but none saw operational service. Many nations had experimental programs involving such engines by the early 1950s one typical example was Rolls Royce Plc Rolls Royce s Rolls Royce Thrust Measuring Rig Thrust Measuring Rig TMR , nicknamed the Flying Bedstead , which took its lift solely from engine thrust. An early dedicated lift jet was the Rolls Royce RB108 , first run in 1955. In the early 1960s both the USSR and western nations considered the possibility of lift engines as a way of providing STOL or even VTOL capability to combat aircraft. The Soviets did side by side testing of versions of combat aircraft using swing wing variable geometry wings and lift jets the results became the Mikoyan MiG 23 and Sukhoi Su 24 . The problems with the auxiliary lift engine are high fuel consumption, extra weight which is simply dead weight when the engines are not needed for lift , and taking up fuselage volume that could be used for fuel or other systems. The Soviets decided that variable geometry wings provided comparable advantages in take off performance without as many penalties. Image Yak 38 Forger wings folded.jpg left thumb Yak 38 Forger One of the few operational military aircraft with auxiliary lift engines .... A novel alternative to the lift jet for auxiliary vertical thrust is to be employed by the VTOL ... a jet lift engine, but a central lift fan that is powered by the main engine via a driveshaft ... more details
unreferenced date November 2010 An axel lift in pair skating is a movement in which the woman is turned over her partner s head one and a half times. From a position of holding hands on one side, her partner lifts her with his hand under her armpit and the lift begins from the woman s outside forward edge and ends on the outside backward edge of her opposite ice skate skate . The man rotates below her during the movement. External links http www.probertencyclopaedia.com cgi bin res.pl?keyword Axel Lift&offset 0 Axel lift Figure skating DEFAULTSORT Axel Lift Category Figure skating elements Category Pair skating Figure skating stub ... more details
merge to Lift soft drink date April 2012 Unreferenced date July 2007 Manzana Lift is the name of a carbonated drink produced by the Coca Cola company. It is apple flavored and is distributed in Latin America . The word manzana means apple in the Spanish language . Manzana Lift is available in five versions red apple, green apple, golden apple, zero red apple sugar free and calorie free and Manzana 25 less sugar, more apple juice . Coca Cola brands Category Coca Cola brands Category Apple sodas soft drink stub it Manzana Lift ... more details
File Surface lift.jpg thumb right 300px A surface lift A surface lift is a type of cable transport ation system used to transport skiers and snowboarders where riders remain on the ground as they are pulled uphill. Types of surface lifts include the Poma lift , J bar lift J bar , T bar lift T bar , rope tow , and Magic carpet ski lift magic carpet . ref name skiliftgloss cite web url http skilifts.org glossary.htm title Glossary Entry Surface Lift publisher SkiLifts.org accessdate 2007 04 16 archiveurl http web.archive.org web 20070302110923 http www.skilifts.org glossary.htm Bot retrieved archive archivedate 2007 03 02 ref Although these types of lifts were once prevalent, they have since been overtaken in popularity by higher capacity aerial lifts like chairlift s and the gondola lift . Today, surface lifts are most often found on beginner slopes and very small ski area s. ref cite web url http skilifts.org technical.htm title Technical Information for lifts publisher SkiLifts.org accessdate 2007 04 16 archiveurl http web.archive.org web 20070206113418 http www.skilifts.org technical.htm Bot retrieved archive archivedate 2007 02 06 ref Surface lifts have the advantage of being less intimidating, especially for beginners the speed is slow relative to aerial lift s , they are usually situated on beginner terrain, the passenger s safe loading window is wider than most types of lift, and remaining on the ground is perceived to be more controlled than off the ground. They are also generally less expensive to construct and maintain than an equivalent length aerial lift. The disadvantages of a surface lift include less passenger capacity in terms of passengers per hour . They add ..., and require more new passenger skills than most types of aerial lift to safely ride. During the summer of 2010, Vail Ski Resort in Colorado constructed an elevated surface lift, which provides ... is too great for a conventional surface lift, so the resort built the lift into the air. fact ... more details
Infobox Film name De Lift image De Lift poster.jpg caption Take the stairs, take the stairs. For God s sake, take the Stairs director Dick Maas producer Matthijs van Heijningen writer Dick Maas starring Huub Stapel br Willeke van Ammelrooy br Josine van Dalsum music Dick Maas cinematography editing distributor released May 11, 1983 Netherlands runtime 95 min. Dutch cut country Netherlands language Dutch language Dutch budget De Lift The Elevator is a 1983 in film 1983 film by the Netherlands Dutch director Dick Maas about a killer elevator that traps some party goers and decapitates a security guard. In 2001, an English language remake, Down film Down , was made and was also directed by Dick Maas . External links imdb title 0087622 Rotten Tomatoes de lift the lift goin up DEFAULTSORT Lift, De Category 1983 films Category Dutch films Category 1980s horror films Category Films directed by Dick Maas Category Dutch horror films Netherlands film stub 1980s horror film stub de Fahrstuhl des Grauens fr L Ascenseur it L ascensore film nl De lift ... more details
of ski areas have lifts which cross one another, usually with an aerial lift crossing above a surface lift and more rarely with two aerial lifts crossing at different heights above the ground. Small ... s or gondola lift gondolas are often used to span across several tiers at once, to allow rapid access ... Neil Evans. See also Commons category Ski lifts Lift ticket List of aerial lift manufacturers List ... work, plus specifications and photos of many North American ski lifts http www.lift world.info Lift ... illustrating various types of ski lift networks can be found on the trail maps of most individual ski ... Alpine ski maps of many European ski resorts SkiLift DEFAULTSORT Ski Lift Category ... more details
Image Lastbil med lift.JPG right thumb A hydraulic cantilever tail lift on the back of a truck File Tail lift deploy.png right thumb Four stages of deployment on an ambulance tail lift File Tail lift control.png right thumb Control for a tail lift A tail lift is a mechanical device permanently fitted to the back of van or truck lorry , which is designed to facilitate the materials handling of goods from ground level or a loading dock to the level of the load bed of the vehicle, or vice versa. The majority of tail lifts are hydraulic or pneumatic in operation, although they can be mechanical, and are controlled by an operator using an electric relay relay switch . The use of a tail lift can obviate the need to use machinery such as a forklift truck in order to load heavy items on to a vehicle, or can be used to bridge the difference in height between a loading dock and the vehicle load bed. Tail lifts are available for many sizes of vehicle, from standard vans to articulated lorries, and standard models can lift anywhere up to 2500kg. ref name hiab cite web url http www.hiab.com taillifts title Zepro Tail lifts product history accessdate 2007 06 05 ref Types There are two key types of tail lift available to operators these are Column lifts Column lifts are often mechanical, although they can be hydraulic or pneumatic. They run on tracks fitted to the rear of the vehicle. From the tracks, a folding platform extends, which can be taken up and down. Column lifts have the advantage of being able to lift to a higher level than the load bed and are therefore suitable for loads over more than one level in the truck. ref cite web url http www.ratcliff.co.uk palfinger 16461 EN.pdf title Ratcliff Double Tier Lift accessdate 2007 06 13 ref They are usually the easiest of the lift types ..., the lift will not meet the ground properly. Cantilever lifts The cantilever lift is the type ... ramp, and giving access and egress for operatives without the need to operate the lift. References ... more details
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