单选题Hot gas bypass is one of the methods used to （）Arelieve excessive compressor head pressureBproduce flash gas at the expansion valveCreduce flooding of the receiver at low loadDdefrost the evaporator coils
单选题
Hot gas bypass is one of the methods used to （）
A
relieve excessive compressor head pressure
B
produce flash gas at the expansion valve
C
reduce flooding of the receiver at low load
D
defrost the evaporator coils
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