Lubricating oil is supplied to the crank-pin bearings in a marine diesel engine by （）.<br>A:internal crankshaft passages<br>B:immersion in oil<br>C:splash lubrication<br>D:injection lubrication

Lubricating oil is supplied to the crank-pin bearings in a marine diesel engine by （）.
A:internal crankshaft passages
B:immersion in oil
C:splash lubrication
D:injection lubrication

出自：海船船员证

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