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对兰炼研制的680中、重负荷工业齿轮油的研究进行了阐述。
The study on 680 medium & heavy-duty industrial gear oils developed by LPPCC was described.
youdao
-
对兰炼研制的680中、重负荷工业齿轮油的研究进行了阐述。
The study on 680 medium & heavy-duty industrial gear oils developed by LPPCC was described.
youdao