After full theoretical analysis and experimental research, high-pressure steam jet can not only improve the quality of heavy oilinsulated pipe cleaning, and no environmental pollution.
经过充分的理论分析和实验研究，高压蒸汽射流不仅可以提高稠油隔热管的清洗质量，而且对环境没有污染。
2
Detection of furfurol content in transformer oil is an effective method to judge the aging degree of insulated paper in the transformer.
检测变压器油中糠醛含量是判断变压器绝缘纸老化程度的有效方法。
3
The DC test, which is an effective means for the diagnostics of oil impregnated paper insulated cable, is still used even now, but it is ineffective and harmful for the plastic insulated cable.