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數學和力學不行,我買的書20%看不懂 |
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點評
上班很無聊,看書解悶
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點評
求人不如求幾,自己上網找唄。
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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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Archiver|手機版|小黑屋|機械社區 ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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