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 （）.<br>A:flashing water<br>B:operating oil<br>C:flushing water<br>D:sealing water

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

出自：海船船员证

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