Limited due to the work environment or in the need to increase the lifting height of the structure, the section manual hoist s can be effectively utilized.
Chain hoist use is not very flexible, and to push heavy objects, hands clockwise pull load chain will ratchet friction plate, brake pressure into one common rotation axis will rotate sprocket teeth, so that the device spline hole lifting gear driven sprocket on lifting chain, smooth heavy lifting. But encountered dead general chain hoists are inevitable, and this is a drawback to use chain hoists,
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