Beijing Geology and Mineral Resources Exploration and Development Bureau;
Hydrogeology and Engineering Geology Team of Beijing;
Beijing Geology and Mineral Resources Exploration and Development Bureau;
Hydrogeology and Engineering Geology Team of Beijing;
Beijing Geology and Mineral Resources Exploration and Development Bureau;
Hydrogeology and Engineering Geology Team of Beijing;
Beijing Geology and Mineral Resources Exploration and Development Bureau;
Hydrogeology and Engineering Geology Team of Beijing;
Beijing Geology and Mineral Resources Exploration and Development Bureau;
Hydrogeology and Engineering Geology Team of Beijing;
Beijing Geology and Mineral Resources Exploration and Development Bureau;
Hydrogeology and Engineering Geology Team of Beijing;
Beijing Geology and Mineral Resources Exploration and Development Bureau;
Hydrogeology and Engineering Geology Team of Beijing;
Beijing Geology and Mineral Resources Exploration and Development Bureau;
Hydrogeology and Engineering Geology Team of Beijing;