| 摘要 |
<p>A height adjustable bearing frame for manhole covers, comprises a frame (14) for holding and translating a manhole cover (12) vertically. The frame is provided with a plurality of threaded pins (18) on which nuts (16) are screwed. The nuts (16) are rotatingly carried by the walls (11) of the conduit (10) closed by the manhole cover (12) so as to allow the vertical translation of the manhole cover's bearing frame (14). <IMAGE></p> |
