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Trestle stand has rollers to support unloaded stands, and springs compressed under load to lock stand in place
Trestle stand has rollers to support unloaded stands, and springs compressed under load to lock stand in place
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机译:栈桥支架具有滚轮以支撑空载的支架,并在负载下压缩弹簧以将支架锁定到位
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摘要
Each stand has rollers fastened to its underside via springs. When the stand is not under load, it rests on the rollers and can be moved. A load supported on the stand causes the springs to be compressed and prevents it from being moved.
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