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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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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,,京ICP證050210號,,浙公網(wǎng)安備33038202004372號 )
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