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單項選擇題

In a purifier, the interface between the liquid seal and the oil should be positioned as close as possible to （）.

A.the outlet of oil
B.the outlet of water
C.the bowl periphery
D.the center of bowl

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單項選擇題

In 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

單項選擇題

In a marine diesel engine the oil sump is （）.

A.just below the crankcase
B.the oil cup for the exhaust valve
C.the pan for collecting drain fuel oil
D.oil circulating pump

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