Sludge may form in the crankcase of an air conditioning compressor as a result of （）.<br>A:bubbling refrigerant<br>B:overheating and oxidation<br>C:lowered operating temperatures<br>D:reducing the cloud or flash point

Sludge may form in the crankcase of an air conditioning compressor as a result of （）.
A:bubbling refrigerant
B:overheating and oxidation
C:lowered operating temperatures
D:reducing the cloud or flash point

出自：海船船员证

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