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攻絲的煩惱:螺紋總是斷絲錐,今天已經是第4個了 |
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點評
只有手用絲錐才分一二三攻,現在機用絲錐都是一刀出的,要是分123攻就不怕亂牙么?
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Archiver|手機版|小黑屋|機械社區 ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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