KnowraLubricationLinked fromLinked fromThe 14 pages that link to Lubrication, each with the reason it gives.All 14Broader topic 1Related 9Narrower topic 3Compared with 1PistonNarrower topic: An oil film separates sliding piston components from the cylinder wall.Hydraulic fluidNarrower topic: Hydraulic fluid often lubricates pumps, valves, and actuators while transmitting power.Petroleum jellyNarrower topic: Its slippery, persistent coating makes petroleum jelly useful where skin or materials rub.