Our company began invention and produced these devices as well as put them into market since 2001. In more than ten years, the development of science and technology has resulted in our renovation and replacement of products. We have become the biggest manufacturer for producing automatic explosion venting devices. Innovation -oriented, the company has been committed to develop new products. Now, we have obtained 11 invention patents and 14 utility model patents, filled up multinomial blanks in safety field in China or even in the world. Our products have been listed as national standard for explosion prevention for electric power system. They are always leading the technology trend, and have been copied by others but have never been exceeded.