Summary | Huabei Oilfield Co has the world's deepest gas
storage tanks underground and has begun to provide a steady gas
supply to the clean-energy thirsty region of Beijing, Tianjin
and Hebei province.
storage tanks underground and has begun to provide a steady gas
supply to the clean-energy thirsty region of Beijing, Tianjin
and Hebei province.
chinadaily.com.cn | 18 April 2016