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厥屁股需要底蘊嗎,?厥著能玩互聯(lián)網嗎,?哈哈,, |
點評
哈哈,,妙啊
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點評
要懂大型柴油機,,各種變速器,大型螺桿泵或者大的隔膜泵,,設計整個管路的‘上山’,,‘下山’,‘流不滿’,,液壓沖擊,,等等問題,還要懂大型管道焊接,,檢測,,監(jiān)測,等等
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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,,浙公網安備33038202004372號 )
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