| 摘要 |
<p>The lifesaving and escape stairway (4) is multi-functional and incorporates a pair of fixed structural pieces (1',1'') and a pair of movable structural pieces (6',6''), together with several flat steps (8), each with two opposing short sides with a front end and a rear end. Each flat step with its front end of its short sides is pivotably fixed in a first fixture point in the fixed structural pieces. In the rear end of its short sides each step is pivotably fixed in a second fixture point in the movable structural pieces. The first fixture point of the flat steps in the fixed structural pieces is placed in the lower part of the short sides. The second fixture in the movable structural pieces is placed in the upper part of the short sides.</p> |
