Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）<br>A:Splash<br>B:Gravity<br>C:Pressure<br>D:Bypass

Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）
A:Splash
B:Gravity
C:Pressure
D:Bypass

出自：海船船员证

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