Due to the technological characteristics of jewelry processing, stones weighing several kilograms are cut into small pieces during the production process and then carved into exquisite carvings. During the processing, not only the dust concentration is high, but also the noise is not small. At the same time, cyanide, benzene series (benzene, toluene and dimethyl), methanol and other chemicals are used. This kind of working environment still has a great influence on the body, not only on the lungs, but also on hearing in the long run. Be sure to prevent dust.