1474| 5
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螺紋通徑跟公稱直徑跟中徑是一樣的嗎 |
點評
這個通徑是指管子的內徑與外徑中間的值嗎
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點評
原來是這樣啊
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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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