单项选择题
A.compression pressure in the cylinder will be higher B.carbon will accumulate behind the ring C.combustion gases will penetrate beneath the ring land D.piston side thrust will be increased
A.copper B.carbon C.hydrogen D.sulfur
A.The cylinder indicator cocks should be opened B.The sump lube oil scavenge pump should be secured immediately C.The explosion relief valves should be manually opened D.The crankcase should remain unopened until the engine has cooled