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GB/T 20333-2006 圓柱和圓錐管螺紋絲錐的基本尺寸和標志 |
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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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