单项选择题
A.a flame trap B.a relief valve C.a fusible plug D.a bursting cap
A heater in the circuit facilitates warning of the engi...
单项选择题A heater in the circuit facilitates warning of the engine prior to （） by circulating hot water.
A.starting B.stopping C.to start D.to stop
A gudgeon pin in a trunk piston may be free to float an...
单项选择题A gudgeon pin in a trunk piston may be free to float and rotate, with （） to limit axial movement.
A.split pins B.crankpins C.dipsticks D.circlips
A governor automatically controls engine speed by regul...
单项选择题A governor automatically controls engine speed by regulating （）.
A.fuel supply B.firing order C.engine load D.oil level
