No.93 Mentougou District Popularity Ranking Beijing No.10 Petroleum Equipment No.10 Well Completion No.12 Oil Field Technology Services No.13 Petroleum Technology No.22 Drilling No.24 Oil and Gas Field No.69 Oil and Gas No.78 Energy Services Petroleum Plain Oil Electromechanical Systems Electromechanical 瞪羚企业 中关村高新技术企业 高新技术企业 省级高新技术企业 市级高新技术企业