... structure is beautiful, operation is simple, no consumptive parts, and depreciation cost is low.3.Maintenance-free.4.Can ... , spray material, plastic, rubber, epoxy resin, ceramic, and other materials.Industry: the phone keypad keys translucent plastic, ... products, sanitary ware, tools, accessories, knives, glasses, clocks and watches, jewellery, automobile accessories, bags decorated clasps, cookers, ...