单项选择题
A.the “ nip ”is zero B.the “ nap ” is zero C.the “ gap ”is correct D.the “ clearance ” is correct
In （）the control action is independent on the output.A....
单项选择题In （）the control action is independent on the output.
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
