| 摘要 |
<p>The hoist is mounted in a window frame and consists of two locating brackets (19,22) separated by a distance bar (23) adjustable at the ends. The frame (12) is joined to a tie bar (21) which is attached to the top bracket. The frame (12) is attached to the bottom bracket by an adjustable bar (18). The load (2) is hoisted onto the beam (8) by a cable (31). The beam is supported at the inboard end by vertical adjustable support (10). The beam slides inward with the load.</p> |
