该系统在全球范围内被用来对发动机油粘度分级。

The system, has been adopted worldwide for engine oil viscosities.

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欢迎加入全球领先飞机发动机系统制造公司！

Welcome to join global leading Engine System Company!

youdao

欢迎加入全球领先飞机发动机系统制造公司！

Welcome to join global leading Engine System Company!

youdao