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Concerningdieselpropelledvessels,theasternpoweristoprovideforcontinuousoperationastern()。
A、equaltothatavailableforaheadoperation
B、at70percentoftheaheadrpmatratedspeed
C、whileunderwayandunderallnormalconditions
D、at70percentoftheaheadrpmotaveragecontinuousseaspeed
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