Oil is used in various types of machinery to reduce friction and protect machinery and processing parts of liquid lubricant, mainly from the lubrication, cooling, anti-rust, cleaning sealing and cushioning so on. Oil accounts for 85% of all lubricating materials, many types of brands, now with about 38 million tons in the world

         (1) anti-friction wear, reduce friction to save energy and reduce wear to extend mechanical life and increase economic efficiency;
      
         (2) sealed, leak proof required, dust, gas channeling;
   
         (3) cooling, required to keep friction heat from the plane;

         (4) clean washing, cleaning requirements of the friction dirt exclusion area;
        
         (5) anti-corrosion rust, friction surface for protection from foreign oil deterioration corrosion;
 
         (6) stress dispersion buffer, spread the load and ease the shock and vibration;

         (7) kinetic energy transmission, hydraulic systems and other remote variable speed motor and friction.



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