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數(shù)學和力學不行,,我買的書20%看不懂 |
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點評
求人不如求幾,自己上網(wǎng)找唄,。
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點評
機床維修,液壓,,氣動,,機械,軸承,,電氣,,操作
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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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