单项选择题
In an oily water separator the oil will travel （） to the oil collecting spaces.
A.upwards
B.downwards
C.outwards
D.forwards
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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 smaller 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 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
