1, hair has done: screws, wire buckles, nuts, rods, steel beads, rivets<br>2, the hair out process has surface plating, plating<br>3, metal products surface treatment
1. The external products are: screws, screw threads, nuts, inserting rods, steel balls and rivets<br>2. The external process includes surface plating and electroplating<br>3. Surface treatment of hardware products<br>