6693| 20
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觸指加工,求助 |
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點評
讀帖不仔細,沒看到“用內徑150mm,壁厚3mm的管坯加工而成”?
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小黑屋|手機版|Archiver|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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