单项选择题
A.the air receivers B.the starting valves C.the cylinder covers D.the distributors
Charging-air pressure increases if there is incorrect c...
单项选择题Charging-air pressure increases if there is incorrect combustion and drop in the （） of the diesel engine.
A.machine efficiency B.machinery efficiency C.mechanical efficiency D.mechanics efficiency
Charging is the filling of the engine cylinder with a s...
单项选择题Charging is the filling of the engine cylinder with a supply or charge of fresh air （） compression.
A.to need B.ready for C.want to D.going to be
单项选择题Charging is the filling of the engine cylinder with a supply of （） for compression.
A.water B.fresh air C.fuel oil D.gas
