... overseas subsidiaries in Canada and Hongkong . The company has become one of the largest manufacturers and ... , lighting, semiconductor, ultra pur , calibarion, medical and foods , etc, we are offering customized gas mixtures and technology ... our customers .We are an ISO9001:2008 certified company , we have a whole set of quality management ... customer . Hexafluoroethane C2F6, specialty gas, pure gas,