单项选择题
For a purifier changing to a gravity disc with smaller hole diameter will move the interface towards the（）.
A.bowl periphery
B.bowl center
C.upper surface
D.lower surface
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相关考题
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单项选择题
For a purifier, changing to a gravity disc with larger hole diameter will move the interface towards the （）.
A.bowl periphery
B.bowl center
C.upper surface
D.lower surface -
单项选择题
For many years marine centrifuges were designed for （） operation, that is the machines were run for a period during which solids accumulated in the bowlThe machine was stopped when the accumulated solids began to impair its performance.
A.purifying
B.batch
C.long period
D.temporary -
单项选择题
When a clarifier is running the impurities and water collect at the bowl （）.
A.center
B.periphery
C.inlet
D.upper parts
