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單項選擇題

The （）is fitted on an oily water separator.

A.sliding bowl bottom
B.gravity disc
C.bowl
D.liquid level detector

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單項選擇題

The （）is not a component of an oil separator.

A.sliding bowl bottom
B.gravity disc
C.separating disc
D.scum valve

單項選擇題

The （）pump is usually used as the lubricating oil pump.

A.turbine
B.screw
C.vaneejector
D.centrifugal

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