... The structure is beautiful, operation is simple, no consumptive parts, and depreciation cost is low.3.Maintenance-free.4. ... only 1/10 of lamp-pumped solid-state laser marking machine.5. Long life time of laser tube (about ... , communication products, sanitary ware, tools, accessories, knives, glasses, clocks and watches, jewellery, automobile accessories, bags decorated clasps, cookers, stainless steel ...