4820| 11
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有用数控车床玩2PC球阀同行吗? |
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补充下,我是玩数控车床的
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管螺纹
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有可能是55度密封管螺纹
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我只是推测,理由如下
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小黑屋|手机版|Archiver|机械必威体育网址 ( 京ICP备10217105号-1,京ICP证050210号,浙公网安备33038202004372号 )
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