The product uses high-quality bronze plate as the substrate, the surface is sintered with lead bronze platform gold, and the solid lubricant is evenly distributed in the alloy layer. The surface of the alloy layer can be covered with a solid lubricant film according to actual needs, so that the product always maintains a low coefficient of friction , It can provide better self-lubrication, wear resistance, anti-bite and other properties, the product is used in high load, polluted environment and in water or other liquids.