Exploration and Development Research Institute of Daqing Oil Field Company Ltd
Exploration and Development Research Institute of Jilin Oil Field Company
Exploration and Development Research Institute of the North China Oil Field
Exploration and Development Research Institute of Zhongyuan Oil Field Company
Huabei Oil Field Exploration and Development Institute
Institute of Exploration and Development of the Jitin Oil Field
Petroleum Exploration and Development Institute of Huibei Oil Field
Research Institute of Exploration and Development Jianghan Oil Field
Research Institute of Petroleum Exploration and Development of Jianghan Oil Field Company
The Institute of Petroleum Exploration a nd Development of Huabei Oil Field
Xi’an Shiyou University Institution of OilGas Field Development
Exploration and Development Research Institute of Daqing Oil Field Company
Research Institute of Petroleum Exploration and Development of the Changqing Oil Field
laser diffraction instantaneous pollutant concentration field measurement
atmospheric electric field instrument
balloon borne two sphere electric field instrument
Electric field instrument
electric field instrument networking