Chaigoupu, Zhangjiakou, Hebei, China
âBeijing Invention Biology Engineering & NewMaterial Co., Ltd. (Beijing invention) is a joint venture set up in1993 approved by Beijing Economy Trade Committee. As ahigh-tech company with the function of research, development,production sale, and foreign trade, invention has mostcapable technology team, advanced ...
intumescent, fire proof, fire collar, pipe collar