Lubricating oil is a liquid or semi-solid lubricant used on various types of automobiles and mechanical equipment to reduce friction and protect machinery and machined parts. It is mainly used for lubrication, auxiliary cooling, rust prevention, cleaning, sealing and buffering (Roab)
Metalworking fluid is also known as "coolant". According to different machining requirements, metalworking fluid can be divided into cutting fluid, grinding fluid and other types. In the manufacturing industry, metalworking fluids are widely used, such as in engine machining and gearbox machining, equipment manufacturing, gear industry, etc.