1. Research Institute of Natural Gas Technology PetroChina Southwest Oil and Gasfield Company Chengdu Sichuan China
2. National Energy R&D Center of High Sulfur Gas Exploitation Chengdu Sichuan China
3. High Sulfur Gas Exploitation Pilot Test Center CNPC Chengdu Sichuan China
4. PetroChina Southwest Oil and Gasfield Company Chengdu Sichuan China