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螺紋單一中徑和作用中徑的區(qū)別是什么,?請,? 專業(yè)易懂的講解一下? |
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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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