3199| 7
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GB/T 17395-2008 无缝钢管尺寸、外形、重量及允许偏差 |
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小黑屋|手机版|Archiver|机械社区 ( 京ICP备10217105号-1,京ICP证050210号,浙公网安备33038202004372号 )
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