Beijing Haidian DistrictNo.4 Sewage Treatment TechnologyNo.6 Papermaking EngineeringNo.6 Wu Ran ControlNo.6 Wu Ran Zhi ManagementNo.7 Gong Ye Fei Water TreatmentNo.8 Wu Hai Chemical ProcessingNo.8 Shui Wu Ran Zhi ManagementNo.16 Fei Water TreatmentNo.23 Coal ChemicalsNo.34 Water Treatment EngineeringNo.35 Shui Chu Li Wei HuNo.37 Sewage Treatment发明专利专精特新企业专精特新小巨人企业高新技术企业瞪羚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科技型中小企业市科技型中小企业