No.254 Longgang District Popularity Ranking Shenzhen Guangdong No.2 Purification Equipment No.3 Central Air Conditioning No.3 Filters No.3 Boilers Technology No.4 Air Purification Equipment No.4 Boilers Equipment No.5 Refrigeration Equipment No.6 Compressors No.8 Refrigeration No.11 Refrigeration Engineering No.15 Special Equipment No.19 HVAC 国家高新技术企业 高新技术企业 省级高新技术企业 市级高新技术企业