Beijing Changping DistrictNo.12 Well Logging TechnologyNo.13 Oil Field Technology ServicesNo.16 Petroleum TechnologyNo.26 Oil and Gas FieldNo.50 Zi Ran Zi YuanNo.54 Liang InstrumentsNo.74 Oil and Gas Precision Instruments Ke Xue Instruments Precision Machinery Petroleum Metrology Management中关村高新技术企业瞪羚企业市级专精特新中小企业市级创新型中小企业省级高新技术企业市级高新技术企业ISO9001认证