... Welding Helmet 1.CE,ISO9001 approved 2.Best quality Automatic welding helmet 1. The design ... designing it. It adopts ergonomic principles, with large internal space, which makes it easy to ... ears and so on.2. liquid crystal of high quality, optical coating, and protection for sheilding ultraviolet ... clealy, thus reducing repeaed welding, and improve efficiency.4. The original design of automatic transform ...