单选题The position of the interface between oil and water within the centrifuge is achieved by the use of （）.Agravity discBcentrifugal bowlCa stack of discsDmain sealing ring
单选题
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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