单项选择题
A.invade B.provide C.detergent D.neutralize
The oil is drawn from a drain tank through （）, one of a...
单项选择题The oil is drawn from a drain tank through （）, one of a pair of pumps, into one of fine filters.
A.a strain tank B.a head tank C.a service tank D.a strainer
The needle valve will open when the fuel pressure actin...
单项选择题The needle valve will open when the fuel pressure acting on the needle valve （） exerts a sufficient force to overcome the spring compression.
A.tape face B.tapered face C.surface D.thinner face
The needle valve in the injector （） at a pre-set pressu...
单项选择题The needle valve in the injector （） at a pre-set pressure which ensures that the fuel will atomize once it enters the cylinder.
A.will lift B.will be lifted C.will close D.will be closed
