2 with water as the dispersion medium, no pollution to meet the requirements of environmental protection, non flammable, storage, transport and use process safety guaranteed;
2以水作为分散介质，无污染符合环保要求，不燃，储存、运输和使用过程中的安全性得到保障；
As the characteristics of different oils in the industrial waste water and pollution sources of the railway enterprises, the non dispersion infrared photometry is the first selection.
根据铁路主要企业含油工业废水中油种来源及污染源特点，非分散红外光度法为首选方法。
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