Sweating of the refrigeration system compressor crankcase is caused by （）.<br>A:too much superheat<br>B:insufficient superheat<br>C:suction pressure too low<br>D:excessive refrigerant returning to the compressor

Sweating of the refrigeration system compressor crankcase is caused by （）.
A:too much superheat
B:insufficient superheat
C:suction pressure too low
D:excessive refrigerant returning to the compressor

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