Shenzhen Investment Development Co., LtdShenzhen Long Guan Yu Investment Development Co., Ltd. Is a modern high-tech enterprise specializing in R & D, manufactureãsales and service of welding & cutting equipments. In technology and quality control, the company always follow the trends of world leading manufacturers in USA. Germany and Russia etc. Incorporated with innovation on advanced inverter technology, the company has been developing and manufacturing state-of-the arc welding and cutting equipments that meet requirements of domestic and international markets. |
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