The National Wheel-O-Vator Co., Inc. Model CDE Vertical Platform Lift (Acme Screw Drive) Model HCDE Vertical Platform Lift (Hydraulic Drive) The CDE and HCDE models are manufactured with a stationary enclosure, including gates and doors, as needed for each application. These units do not require a hoistway or runway to be built by others. The enclosure structure uses steel tubing for indoor use and aluminum for outdoor use. It has steel panels in the walls, making a smooth interior for the lift to operate. Also, the CDE and HCDE can be enclosed overhead to protect the user from inclement weather. Optional lighting and ventilation can be provided. 
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