单项选择题
Thermocouple pyrometers are used on large, main propulsion diesel engines to indicate the temperature of the（）
A.cooling water leaving each cylinder B.fuel oil entering the injector C.exhaust gases at various locations D.lube oil at the bearing supplies
单项选择题 Low compression pressure in a diesel engine is caused by（）
单项选择题 A pyrometer is an instrument used to measure the temperature of the diesel engine（）
单项选择题 Low compression pressure in a diesel engine can be caused by（）
