| 摘要 |
An extension structure for a tool includes a main body, a drive rod movably mounted in the main body, an elastic member mounted in the main body and urged between the main body and the drive rod, and a rotation control member rotatably mounted on the main body and rested on the drive rod, so that the drive rod is moved in the main body by rotation of the rotation control member. Thus, the extension structure is assembled easily and quickly and has a rigid construction without detachment.
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