... machinery, auto industry, motor industry, optical industry, watchmaker, jewelry maker, plating& painting industry, food industry, medical& pharmacy ... valve, golf clubs, optical lens, eyeglass, sunglass, metal, gold, jewelry, diamond, watch band, watch cover, watch hand, polishing ... molds, toy, seal, flapper, coins, pottery, silver, gold products, bank card, IGBT Specifications: Ultrasonic Frequency 40, ...