5 . the oil concentration has negligible effect on the pressure drop of the mixture 5 、润滑油浓度的增加对混合物凝结压降影响不大。
2.
( 5 ) the experiment on the condensation resistance characteristics of hc290 - oil mixture shows the oil concentration has negligible effect on the pressure drop of the mixture ( 5 ) hc290含油混合物微肋管内凝结过程阻力性能实验表明,润滑油浓度的增加对混合物凝结压降影响不大。