发明授权
US06992244B2 Hold down clamp 有权
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Hold down clamp
摘要:
A base drum rim clamp device comprising in combination, a base, a wedging device to exert clamping force that device carried by the base, means to displace said device to move a surface or surfaces of the device relatively toward one side of a base drum rim, and a clamp part to which clamping force is transmitted at the opposite side of the drum rim.
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