题目内容
Crank chamber oils must have good lubricating properties and be able to resist rupture of the film separating the moving parts in order to( )
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Large,slow speed, two-stroke marine diesel engines offer the advantages of the following except( )
Where will the thrust forces from the propeller be transferred to ( )through a thrust bearing?
Most medium-speed diesel engines are ( ),meaning that a controllable pitch propeller is both usually employed to cater for astern thrust.
The ( )engine usually be directly coupled to the propeller as the maximum efficiency of each can be matched at a suitable rotational speed.
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