The preparation, evaluation and field test of the fourth generation zinc-free locomotive oil is de- scribed.

本文介绍了铁路内燃机车非锌第四代油的研制、评定及行车试验结果。

youdao

The preparation, evaluation and field test of the fourth generation zinc-free locomotive oil is de- scribed.

本文介绍了铁路内燃机车非锌第四代油的研制、评定及行车试验结果。

youdao