Beijing Changping District No.12 Jian She Xiang Mu Management No.24 Cai Mines No.25 Coal Mining No.38 Coal No.43 Mines Stones No.58 Jiao Materials No.66 Mining Xue Shu Yan Jiu Research Institute Intellectual Property Coal Mining Construction Mines Wells Construction 高新技术企业 中关村高新技术企业 省级高新技术企业 市级高新技术企业 发明专利 实用新型专利