单项选择题
A.throw B.web C.main bearing D.deflection
Valve overlap is the period during which （）.A.the inlet...
单项选择题Valve overlap is the period during which （）.
A.the inlet valve is open B.the exhaust valve is open C.both valves are closed D.both valves are open
Valve gear knocks are more easily located while the eng...
单项选择题Valve gear knocks are more easily located while the engine （）.
A.is running B.stops C.is repaired D.lacks of oil
VIT means （）A.variable injection timingB.variable inlet...
单项选择题VIT means （）
A.variable injection timing B.variable inlet tonnage C.vertical incoming tonnage D.vertical inlet tank
