This is how planetary rotation started.
这就是行星怎样开始旋转的。
At the same time, differential rotation driven through the planetary gear differential to achieve differential.
同时带动差速器旋转，并通过差速器的行星齿轮实现差速。
The shell not-rotation is the important technical requirement for planetary cross-mill.
轧件不转是行星斜轧机轧制的重要工艺要求。
The shell not-rotation is the important technical requirement for planetary cross-mill.
轧件不转是行星斜轧机轧制的重要工艺要求。
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