单项选择题
A.The high temperature facilitates primary gravity separation
B.Most of the oil and organic solvents are raised to the top layer
C.The high the temperature is, the more the top oil will be collected
D.The high temperature has little use on the separation of emulsified oil
单项选择题 Which one of the following is not generally recognized as one constitute of bilge water?（）
单项选择题 A centrifugal compressor’s purge recovery unit（）
单项选择题 The device, which is installed in the compressor suction line to prevent liquid from entering the compressor when hot gas defrosting, is called a（）