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單項選擇題

A hydraulic motor may be driven by （）.

A.an electric motor
B.a diesel engine
C.a compressor
D.oil

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單項選擇題

A high rate of separation between oil and water is favored by （）.

A.large size of oil globule
B.low temperature
C.high viscosity
D.high flow rate

單項選擇題

When started, a complete oily water separating unit is first filled （）The oily water mixture is then pumped through the inlet pipe into the coarse separating compartment.

A.with dirty water
B.with clean water
C.by oily water
D.by mixed water

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