Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the （） and a recirculation system lubricating the running gear and cooling the piston.<br>A:cylinder liners and piston rings<br>B:main bearings<br>C:crankpin bearings<br>D:turboblower

Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the （） and a recirculation system lubricating the running gear and cooling the piston.
A:cylinder liners and piston rings
B:main bearings
C:crankpin bearings
D:turboblower

出自：海船船员证

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