The effect of extraction on the inter facial property of oil with low acid number is more severe than that with high acid number.

已萃取原油后的碱渡与新原油之间的界面张力将大幅度降低，可以使其最低值和平衡值都达到超低。

In this paper the acid number and breakdown voltage of transformer oil are tested.

加速氧化会使变压器油酸值增加,对变压器油的酸值和击穿电压进行了测定.

Results show that three materials have little effect of inhibiting the raise of acid number.

结果表明,三种包装袋对抑制酸价升高的作用不大.

By determining poy and acid number, the researchers find a satisfactory solution to the problem.

通过对过氧化值，酸价两项理化指标和感观检验的测取，获得令人满意的解决方法。

By determining poy and acid number , the researchers find a satisfactory solution to the problem.

通过对过氧化值,酸价两项理化指标和感观检验的测取,获得令人满意的解决方法.

The results show that water content and acid number raise, flash point and burning point drop and the density of ferromagnetism particles increase slowly along with the increasing mileages.

结果表明，随着行车里程的增加，在用发动机油的含水量和酸值增高，闪点和燃点降低，铁屑浓度缓慢增加；