英译汉：lubrication
举一反三
- The cylinder lubrication system of a large two-stroke diesel engine is usually a kind of _____. A: dry sump lubrication system B: wet sump lubrication system C: splash lubrication D: total loss lubrication system
- In modern engine designs, two methods of lubrication are combined: pressure lubrication and splash lubrication (see Fig.3-7).
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- splash lubrication ______
- pressure lubrication ______