In a direct expansion type multi-box refrigeration system, the compressor is set up to cycle on and off by the（）<br>A:pressurestat<br>B:high pressure cutout<br>C:solenoid valve<br>D:low pressure cutout switch

In a direct expansion type multi-box refrigeration system, the compressor is set up to cycle on and off by the（）
A:pressurestat
B:high pressure cutout
C:solenoid valve
D:low pressure cutout switch

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