The pressure range between the system cut in and cut out pressures in a refrigeration unit is known as（）<br>A:opposing operational drag<br>B:pressure distribution<br>C:differential<br>D:system purge

The pressure range between the system cut in and cut out pressures in a refrigeration unit is known as（）
A:opposing operational drag
B:pressure distribution
C:differential
D:system purge

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