单项选择题
A.cooling water B.vapor from the boiler C.starting air D.hot gases
In the （） pressure charging system the pulse of energy ...
单项选择题In the （） pressure charging system the pulse of energy that occur as the exhaust is released from the cylinder to improve the output of the turbocharger.
A.constant B.pulse C.high D.none of the above
In some designs the cylinder oil is timed so that the o...
单项选择题In some designs the cylinder oil is timed so that the oil injects only on the （）.
A.piston crown B.piston groove C.piston skirt D.piston ring belt
In order to inspect both piston and cylinder wall thoro...
单项选择题In order to inspect both piston and cylinder wall thoroughly, the cylinder cover should be taken off and the piston should be （）.
A.craned out B.rolled out C.lifted out D.turned out
