No.61Jiulongpo District Popularity Ranking ChongqingNo.2 Heat ExchangersNo.2 Air Conditioning SystemsNo.3 Hardware DesignNo.3 Refrigeration EquipmentNo.3 Vehicle-mounted Air ConditioningNo.4 RefrigerationNo.5 Testing MachinesNo.5 Car Air ConditioningNo.5 Modules Chemical DesignNo.6 Refrigeration EngineeringNo.6 HVACNo.8 Zheng Che Zhuang Pei