| 摘要 |
The c-clamp includes a C-shaped body and a screw which can adjustably penetrate through an end of the C-shaped body to clamp or release an object placed between a free end of the screw and the other end of the C-shaped body, a controlling member mounted pivotally with respect to the C-shaped body and provided with a threaded surface which can be rotated pivotally to engage or disengage with the screw, whereby one can determine a fast operation mode or a normal operation mode of the c-clamp.
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