Changsha City Okay Energy Equipment Co., Ltd. is located in beautiful Changsha City, Hunan Province, China. We are specialized in researching and manufacturing Oxy-hydrogen Generators, Water Welding Machines, Flame polishing machines and other products. We have kept close cooperation with institutions of higher learning for several years. Furthermore, we are keeping devoting ourselves to improving old products and developing new products, and doing our best to meet the market demand. ...