还对机油快速分析方法与无污染再生机油作了简要叙述，对非铁路系统同样具有参考价值。
It also describes refreshed engine oil without pollution and its rapid analysis. The contents are valuable to the departments other than railways.
还对机油快速分析方法与无污染再生机油作了简要叙述，对非铁路系统同样具有参考价值。
It also describes refreshed engine oil without pollution and its rapid analysis. The contents are valuable to the departments other than railways.
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