单选题To start the ejection process the oil feed to the centrifuge is first shut off and the oil remaining in the bowl removed by admitting （）.Aflashing waterBoperating oilCflushing waterDsealing water
单选题
To start the ejection process the oil feed to the centrifuge is first shut off and the oil remaining in the bowl removed by admitting （）.
A
flashing water
B
operating oil
C
flushing water
D
sealing water
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