The position of the interface between oil and water within the centrifuge is achieved by the use of （）.<br>A:gravity disc<br>B:centrifugal bowl<br>C:a stack of discs<br>D:main sealing ring

The position of the interface between oil and water within the centrifuge is achieved by the use of （）.
A:gravity disc
B:centrifugal bowl
C:a stack of discs
D:main sealing ring

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