In motor-ships, （）, after passing through main and motion bearings and oil cooled pistons, etcis either retained in the bedplate.<br>A:the fuel oil<br>B:the lubricating oil<br>C:the refrigerating oil<br>D:the hydraulic oil

In motor-ships, （）, after passing through main and motion bearings and oil cooled pistons, etcis either retained in the bedplate.
A:the fuel oil
B:the lubricating oil
C:the refrigerating oil
D:the hydraulic oil

出自：海船船员证

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