单项选择题
A.the cylinder liner B.the cylinder cover C.the cylinder jacket D.the piston
Failure of fuel injection is usually due to trouble in ...
单项选择题Failure of fuel injection is usually due to trouble in the （）.
A.exhaust valves B.mechanical lubricators C.cooling water pumps D.fuel injection pumps
Factor influencing the position of the interface betwee...
单项选择题Factor influencing the position of the interface between the liquid seal and the oil in a purifier is （）.
A.throughput B.back pressure C.gravity disc D.None of the above is wrong
Expansion tank should be used to remove （） from cooling...
单项选择题Expansion tank should be used to remove （） from cooling water.
A.scale B.sludge C.chemicals D.air
