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300厚低合金鋼鉆直徑44.5孔有好的加工方法嗎? |
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點評
換熱器的管板也到不了300吧,你說的是U鉆吧
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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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