What is the application of high-speed diesel engines at sea?(1)They are used for emergency power generation to small applications (2)They are used for electrical power generation on board ships driven by medium-speed propulsion engines.(3)They can be used on tugs拖船, ferries and barges etc.as main engines.
A(1)+(2)+(3)
B(3)
C(2)+(3)
D(1)+(2)
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