单项选择题
A.a closed loop control system B.an open loop control system C.a boiler control system D.a steering gear
The （）is fitted on an oily water separator.A.sliding bo...
单项选择题The （）is fitted on an oily water separator.
A.sliding bowl bottom B.gravity disc C.bowl D.liquid level detector
The （）is not a component of an oil separator.A.sliding ...
单项选择题The （）is not a component of an oil separator.
A.sliding bowl bottom B.gravity disc C.separating disc D.scum valve
The （）pump is usually used as the lubricating oil pump....
单项选择题The （）pump is usually used as the lubricating oil pump.
A.turbine B.screw C.vaneejector D.centrifugal
