ZHONG GUO SHI YOU JI TUAN CHUAN QING ZUAN TAN GONG CHENG YOU XIAN GONG SI ZHANG QING SHI YOU GONG CHENG JIAN DU GONG SI profile picture

ZHONG GUO SHI YOU JI TUAN CHUAN QING ZUAN TAN GONG CHENG YOU XIAN GONG SI ZHANG QING SHI YOU GONG CHENG JIAN DU GONG SI

Technical Manual on Safety and Environmental Supervision of Onshore Oil and Gas Drilling(Chinese Edition)