No.255 Changsha County Popularity Ranking Changsha No.862 Hunan No.1 Processing Processing Equipment No.2 Data Center No.2 Energy Saving Devices No.3 Energy Saving Technology No.3 Laboratory Instruments Equipment No.4 Air Conditioning No.5 Processing Equipment No.6 Chan Xue Yan No.9 HVAC No.12 CNC No.12 Machine Tools No.12 Ke Xue Yan Jiu 高新技术企业 科技型中小企业 省级工程技术研究中心 专精特新小巨人企业 省级高新技术企业 省科技型中小企业 发明专利 国家发明专利 企业技术中心 ISO9001认证