单项选择题
A.bolts welded into the cylinder head B.bolts welded into the cylinder frames C.studs screwed into the cylinder head D.studs screwed into the cylinder frames
The cylinder cover is not provided with （）.A.fuel valve...
单项选择题The cylinder cover is not provided with （）.
A.fuel valve B.lubricator C.indicator valve D.the starting valve
The cylinder contains a great weight of air and is capa...
单项选择题The cylinder contains a great weight of air and is capable of burning a great quantity of fuel at（）.
A.the beginning of the compression stroke B.the beginning of the suction stroke C.the end of the working stroke D.the end of the exhaust stroke
The cylinder and piston must be warmed up （） to a tempe...
单项选择题The cylinder and piston must be warmed up （） to a temperature of about 140 degF in standing by engine.
A.repeatedly B.quickly C.gradually D.immediately
