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為M50X8的內(nèi)梯形螺紋,長度80,如何提高效率,又不打刀 |
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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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