..............page:685-688
..............page:689-693
..............page:694-698
Technologies and cases of oil and gas pipeline abandonment
XU Huatian;MA Hongwei;KANG Yewei;ZUO Li;GUO Zhenghong;CHEN Hongyuan;CNPC Key Laboratory of Oil & Gas Storage and Transportation;PetroChina Pipeline R & D Center;Hohhot Oil & Gas Transmission Sub-company;PetroChina Pipeline Company;Henan Chemical Industry Vocation College;
..............page:699-703
..............page:704-708
..............page:709-713
..............page:714-718
..............page:719-722
..............page:723-726
..............page:727-731+736
..............page:732-736
..............page:737-740
..............page:741-745
Chaotic features of acoustic waves related to natural gas pipeline leakage
WANG Hongchao;CHEN Ruidong;WANG Weixing;National Engineering Laboratory of Oil & Gas Pipeline Transportation Safety;PetroChina Pipeline R & D Center;Qinhuangdao Oil & Gas Transmission Sub-company;PetroChina Pipeline Company;Zhongyuan Oil & Gas Transmission Sub-company;PetroChina Pipeline Company;
..............page:746-750
..............page:751-754
..............page:755-758
..............page:759-763
..............page:764-767
..............page:768-770+774
..............page:771-774
..............page:775-778
..............page:779-783
..............page:784-787
..............page:788-790
..............page:791-794
..............page:795-798