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六角棒,,硬度HRC48-52,,直線度0.1/1000的加工工藝 |
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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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