| 摘要 |
<p>The device comprises a frame (1) consisting of an upper transverse beam (6), a lower transverse beam (71) and a carrier rail (2) fixed to the upper beam (6) and provided with a hoist (3). The frame is moveable and of light construction. The frame may be arranged on the frame (11) of a window and the hoist (3) is manually actuated. This very simple device may be used for finishing works or in finished and inhabited buildings. The mounting and dismounting are quick and the load may be hoisted by one man alone.</p> |
