单项选择题
A.Main circulator pump jacket water cooling
B.Salt water service pump
C.Auxiliary condensate pump
D.Bilge pump
单项选择题 The accumulation of air and other non-condensable gases in a refrigeration system will （）.
单项选择题 Pressure in an operating hydraulic system is developed （）.
单项选择题 If a large difference exists between the compressor discharge pressure and the pressure corresponding to the existing condensing temperature in a refrigeration system, you should（）.