Telescopic lifting device for computer work station, has inner, outer and middle tubes secured to work surfaces which can be set at different levels

摘要

The outer profiled tube is secured to a first fixed work surface (13), the inner profiled tube is secured to a second work surface (6) which can be moved the greatest distance and the middle profiled tube is secured to a third work surface (6) which can only be moved half the distance of the second surface.