Shenzhen Long Guan Yu Investment Development Co., Ltd. Is a modernhigh-tech enterprise specializing in R & D, manufactureãsalesand service of welding & cutting equipments. In technology andquality control, the company always follow the trends of worldleading manufacturers in USA. Germany and Russia etc. Incorporatedwith innovation on advanced inverter technology, the company hasbeen developing and manufacturing state-of-the arc welding andcutting equipments that meet requirements of domestic andinternational markets.