... national patents, includes: Patent of practicality new type 012101210661.5, patent of outside design 01 3 ... , tin, zinc, 24k gold, pure silver, etc. with a strong power, high speed, lower stress, and top ... plating, odd metal plating, alloy plating, special type plating, etc. it not only for hanging plating ... the surface of metal, which forming on surface with 24 k gold, 18k gold, or imitated gold. ...