Critical speeds occurring within the operating spe...
单选题

Critical speeds occurring within the operating speed range of a main propulsion diesel engine may be changed, or have their damaging effects reduced by a/an ()

发布日期:2021-03-22

A.engine support vibration isolator

B.detuner or viscous fluid damper

C.lightened crankshaft flywheel

D.spherically seated crankshaft bearing

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