单项选择题
A.stop valves B.check valves C.safety valves D.reducing valves
A hydraulic motor may be driven by （）.A.an electric mot...
单项选择题A hydraulic motor may be driven by （）.
A.an electric motor B.a diesel engine C.a compressor D.oil
A high rate of separation between oil and water is favo...
单项选择题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
When started, a complete oily water separating unit is ...
单项选择题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
