7836| 12
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50X50的方管需在上下兩面開直徑25的通孔,一次成型,怎么保證同軸度? |
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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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