6999| 15
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活塞內(nèi)部的頂面有些有網(wǎng)紋,有些沒有,是工藝的原因還是對性能有影響? |
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Archiver|手機版|小黑屋|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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