| 摘要 |
<p>The invention concerns a machine comprising a base plate consisting of two parallel axles (1) mutually connected by braces (2) provided with wheels or rollers (4) and a transmission system for moving the base plate, triangular elements (7) vertically arranged on said braces (2) to serve as support to the covering element (16), for example a canvas cover, arranged in accordion in its folding position, and as means for unfolding and folding the cover element synchronously with the transmission system moving the base plate.</p> |
