No.658 Beijing Popularity Ranking No.9 Shijingshan District No.1 Heat Exchangers No.1 Environment Control No.2 Re Jiao Huan No.2 Chemicals Equipment No.3 Healthcare Diagnostics Equipment No.3 Air Conditioning No.3 Machines Cabinet No.3 Cases Machines Cabinet No.4 Reinforcement Switches No.4 Refrigeration Engineering No.6 Refrigeration No.10 Telecom 科技型中小企业 省级专精特新中小企业 省级高新技术企业 省科技型中小企业 省级创新型中小企业 发明专利