Chengdu Xionggu Electrical Industrial Co., Ltd. has been specializing in R & D, production and sales of IGBT inverter and engine-driven welding equipment for nearly twenty years. Now it has been developed into a first-class modernized arc welding equipment base at home. With the technical innovation idea of Go deep into the market, dare to be the first and the product design concept of 'Green and energy-saving, high-efficiency and reliable, a powerful team for technical R & D has been formed in Xionggu, and many new products are brought out every year. D7 and MPS series IGBT inverter multi-functional welding machine are widely applied in the construction of petroleum and natural gas pipeline. Meanwhile, as the recommended products of China petroleum engineering construction system, the products also obtained the financial assistance from the state innovation funds, and are also