No.250 Yubei District Popularity Ranking Chongqing No.3 Wu Ran Control No.4 Wu Ran Zhi Management No.5 Water Supply and Drainage No.5 Water Supply and Drainage Design No.7 Huan Jing Wu Ran Zhi Management No.7 Gu Ti Fei Materials No.7 Vocational Healthy No.8 Sewage Treatment No.9 Water Treatment No.9 Environmental Engineering Design No.10 Drainage Systems No.14 Drainage 会长单位 国家专利 高新技术企业 省级创新型中小企业 市级创新型中小企业 省级高新技术企业 ISO9001认证 ISO14001认证 ISO14000认证