Hangzhou Threenew Machinery and Electronic Co., LTD, located in Hangzhou New and High-tech Industrial Development Zone, was founded in 1991 and firmly confirmed by Science and Technology Committee of Zhejiang Province. &＃12288;&＃12288;We mainly manufacture and do research on Auto-Darkening Welding Helmet (ADWH) and other high-tech protective products (manufacture license number: XK20-1050035).&＃12288;We are the first enterprise to produce ADWH within the mainland of China and have successfully developed infrared-absorbed filter glass with original creation. The products have high protective performance and well industrial practicality. They were listed as the program in Torch Project (1993-1997) by Science and Technology Committee of China. Our products become perfect gradually. The control system components adopt SMD part that is advanced in the international.