单项选择题
A.reduce air charge turbulence
B.induce air swirl
C.deflect hot combustion gas away from the valves
D.oppose the effects of piston induced squish
单项选择题 Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.
单项选择题 Clearance volume scavenging in a turbocharged, four-stroke/cycle diesel engine is accomplished （）.
单项选择题 To prevent vibration damage to the fuel supply line of a diesel engine, you may use （）.