| 摘要 |
<p>The device has a motor driven conveyor and a working platform (1) rotatable within a frame (4) about 180 degree between two working positions under maintenance of the platform position with respect to a horizontal axis (10). The working platform is lockable in working positions. A running surface (2) is turned upwardly in one of the working position and a surface opposite to the running surface is turned upwardly in another working position.</p> |
