单项选择题
（）can not cause oil flow from water outlet of self-cleaning separator.
A.Oil temperature too high B.Diameter of gravity disc too large C.Oil temperature too low D.High level tank out of water
单项选择题 （）can cause oil flow from water outlet of a separator.
单项选择题 When finish work on the oil separator, you should（）firstly.
单项选择题 When separating the lube oil without additive, it is usually cleaned with hot water; the aim is to remove （） from it.
