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求前輩教俺一個圓錐管螺紋2-1/2"的內螺紋程序 |
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人家問的內螺紋。
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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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