Lubricatingoil inside the engine produces a film on the moving parts.
发动机内部的机油在运动部件上形成一层膜。
2
There are many piping systems in the engine room such as fuel oil system, cooling system, lubricating system, fire system, fighting system. How do you identify them?
机舱中有许多管件，像燃油系列，冷却系列，滑油系列，消防系列，怎样识别它们？
3
As the lubricatingoil passes over a hot engine part, it removes a certain amount of heat.