| 摘要 |
<p>The theatre stage podium, for installation on the level of stage (4), auditorium (5), orchestra pit (6), or storage space (7) has two platforms (2, 4), one above the other on a vertically movable hoist frame. The bottom platform (3) is attachable to the frame (14) by means of bolting units providing optional setting at different heights. This platform may be fitted with bolts (23) and the frame with plug holes (22). Hydraulic or pneumatic positioning cylinders may be provided for the bolts. This layout enables the bottom platform to be fixed at varying heights on the hoist frame, independently of the position of the top one.</p> |
