Surface treatment is a process to change the surface of metal materials:
Dalian metal surface treatment belongs to an ancient technology. Since there are humans on the earth, surface treatment is a technology that humans have long mastered. The primitive people lived a hard life and lived in groups. In order to survive, they made stone tools and used grinding technology to make the stone tools have sharp edges, producing a "sharp wedge" effect. In the Neolithic Age, the stone tools used by the primitive people were all polished and the surface was fine and smooth.
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