[1] Chongqing Marketing Division, Gas Transmission Department, Southwest Oil and Gas Branch, PCL
[2] Petroleum Engineering Department, Chongqing Science and Technology Institute
[3] Chongqing Branch, China Aviation Fuel Com.
[4] Renshou Marketing Division, Gas Transmission Department, Southwest Oil and Gas Branch, PCL
[5] Chongqing Marketing Division, Gas Transmission Department, Southwest Oil and Gas Branch, PCL, Chongqing , China