The time of discharging oil is short, but oily water separator discharges oil frequentlyTh

The time of discharging oil is short, but oily water separator discharges oil frequentlyThe possible reason is ____.

A.the sensor of low oil level is fully covered by sludge

B.the coarse strainer before the pump in suction system is clogged

C.the screw pump is worn seriously and volumetric efficiency is decreased

D.bilge suction value is clogged

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