| 摘要 |
The ceiling slabs are constituted from a frame on which a stretched cloth (17) is fixed. A frame (1) ensures the holding of a support (15) for the cloth. The cloth is held at the periphery of the supports by a pressure plate (9). A lower movable plate (11) tensions the cloth and an upper plate (23) is applied to the cloth. An actuator (19) supported on an upper transverse crosspiece (7) operates the upper plate so that it can penetrate inside the pressure plate. |
