Uses: Stamped on a metal plate change argument: such as type, date, lot number, serial number, serial number, and so on. Typical applications: Mechanical, electrical, pumps, valves, auto, electrical on the various types of aluminum, copper, stainless steel, plastic nameplate. Background: Traditional methods of steel percussion, often resulting in font Askew, two-tone, inefficient. A long time, how to improve the grade of signs always plagued industrial engineering staff.