The cleaned heated oil, after passing through the centrifuges, is to be pumped to a （）.<br>A:settling tank<br>B:service tank<br>C:ballast tank<br>D:drain tank

The cleaned heated oil, after passing through the centrifuges, is to be pumped to a （）.
A:settling tank
B:service tank
C:ballast tank
D:drain tank

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