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Change the oil in the rotary gear box (transmission).
更换转盘变速箱机油。
youdao
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Fan gear mainly by the box, planetary gear speed change mechanism, and so on.
风机的变速箱主要由箱体、行星轮系和变速机构等构成。
youdao
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Fan gear mainly by the box, planetary gear speed change mechanism, and so on.
风机的变速箱主要由箱体、行星轮系和变速机构等构成。
youdao