单项选择题
A.a motor-driven steering wheel B.a pneumatic steering wheel C.a hand-driven steering wheel D.an electric steering wheel
The gudgeon pin is carried in （） in the piston skirt.A....
单项选择题The gudgeon pin is carried in （） in the piston skirt.
A.the bearing B.the crosshead C.bosses D.bridges
The governor of a generator engine is to （）.A.make the ...
单项选择题The governor of a generator engine is to （）.
A.make the engine stop B.regulate the timing of camshafts C.make the rpm stabilize at any required value D.make the engine run at nearly constant speed
The gas loads on the engine structure are constrained b...
单项选择题The gas loads on the engine structure are constrained by means of hydraulically preloaded （） which connect the bed plate, frame sections and cylinder jackets into a single unit.
A.connecting rods B.main bearing C.column D.tie rods
