单项选择题
A.engine support vibration isolator
B.detuner or viscous fluid damper
C.lightened crankshaft flywheel
D.spherically seated crankshaft bearing
单项选择题 Performance of a turbocharged engine can be improved by（）
单项选择题 Which of the devices listed is installed on a diesel engine to isolate some of the crankshaft vibrations caused by rotational and reciprocating forces?（）
单项选择题 When used in conjunction with a turbocharger, the main function of an after-cooler is to （）