单选题The pressure difference of the gauge on the oily water separator increases greatly, the reason is（）Athe filter is cloggedBbilge suction value is cloggedCsuction value and discharge value of the pump do not open fullyDscrew pump is worn seriously and volumetric efficiency is decreased
单选题
The pressure difference of the gauge on the oily water separator increases greatly, the reason is（）
A
the filter is clogged
B
bilge suction value is clogged
C
suction value and discharge value of the pump do not open fully
D
screw pump is worn seriously and volumetric efficiency is decreased
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