单项选择题
A.Condenser and thermal expansion valve
B.King and solenoid valves
C.Compressor and thermal expansion valve
D.Condenser and solenoid valve
单项选择题 Which of the following best describes “overcharge of refrigerant”?（）
单项选择题 The presence of air in the condenser of a refrigeration system will （） the condensing pressure.
单项选择题 Which of the following may cause that excessively warm water leaves the condenser in a refrigeration plant? （） (1) too little cooling water (2) too much cooling water (3) too warm cooler water