单项选择题
A.diesel oil instead of fuel oil B.fuel oil instead of diesel oil C.diesel oil instead fuel oil D.fuel oil instead diesel oil
The bearing cap and shell are replaced and tightened up...
单项选择题The bearing cap and shell are replaced and tightened up until （）.
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
