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厥屁股需要底蘊(yùn)嗎?厥著能玩互聯(lián)網(wǎng)嗎?哈哈, |
點(diǎn)評
要懂大型柴油機(jī),各種變速器,大型螺桿泵或者大的隔膜泵,設(shè)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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