... (such as mineral oil, soluble oil, hydraulic oil, fuel oil, lubricating oil) liquid, water-based fluids, such as emulsion, oil and water emulsion, ... applies to suffer concussion medium-voltage hydraulic oil base oil, lubricating oil, heat oil, air and water piping as heavy ... on the pneumatic brake, power steering, fuel filter, turbochargers, oil cylinder equipment device. hydraulic rubber hose R5