单选题A liquid indicator sight glass is useful in determining whether or not a refrigeration system is sufficiently chargedIt is generally located in the（）.Ahigh pressure liquid lineBlow pressure liquid lineChigh pressure vapor lineDlow pressure vapor line
单选题
A liquid indicator sight glass is useful in determining whether or not a refrigeration system is sufficiently chargedIt is generally located in the（）.
A
high pressure liquid line
B
low pressure liquid line
C
high pressure vapor line
D
low pressure vapor line
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