One of several component pieces that are fitted into a diestock to cut threads on screws or bolts.
拔出一颗坏牙；拔出一个尖片；也在抽象意义上使用；
。
One of several component pieces that are fitted into a diestock to cut threads on screws or bolts.
拔出一颗坏牙；拔出一个尖片；也在抽象意义上使用；。
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