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.
 We mainly manufacture and do research on Auto-Darkening Welding Helmet (ADWH) and other high-tech protective products (manufacture license number: XK20-1050035). 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.
 We formulate together with Beijing Labor Insurance Institution the standard of GB/T 3609.1-94 of Auto-Darkening Welding Protecting Eye Mask. Our products are authenticated to be the Excellent Products by Chinese Engineering Construction Welding Association.
 ADWH is a labor protective product of high technology. It turns dark once the welding arc stuck. Consequently, the infrared ray and ultraviolet ray that do serious harm to eyes can be filtered.It prevents occupational disease happening and avoids blinding ignite. By using it, you can save an auxiliary welder, especially suitable for using two-handed operation of Gas-Protective Welding.
 Besides ADWH, we also produce Turntable Cover Welding Helmet (TCWH), Special Welding Helmet (SWH), Auxiliary Protective Helmet (APH), Grinding Protective Helmet (GPH) and other all kinds of welding protective filters.
 Welcome to use our products!