A sight glass is installed in the liquid line to indicate the condition of the refrigerant charge and may also indicate the （）.<br>A:condition of the expansion valve<br>B:moisture in the system<br>C:condition of the compressor suction valves<br>D:condenser temperature

A sight glass is installed in the liquid line to indicate the condition of the refrigerant charge and may also indicate the （）.
A:condition of the expansion valve
B:moisture in the system
C:condition of the compressor suction valves
D:condenser temperature

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