If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.<br>A:refrigerant overcharge<br>B:overfeeding by the expansion valve<br>C:a restricted suction strainer<br>D:due to short cycling of the compressor

If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
A:refrigerant overcharge
B:overfeeding by the expansion valve
C:a restricted suction strainer
D:due to short cycling of the compressor

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