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该柄由工具柄体1、套2、杆3及螺母4和5组成(如图所示)。柄的长度通过旋转套2和杆3进行调整。螺母4、5分别锁紧固定套2与杆3的
The shank consists of the shank 1, sleeve 2, shank 3 and nuts 4 and 5 (as shown). The length of the handle is adjusted by turning the sleeve 2 and the lever 3. Nuts 4 and 5 respectively lock the fixing sleeve 2 and the rod 3