... Huju South Road, Nanjing, covering about 500 square meters) and two factories(one is located ... Yongyang Industrial Park, Lishui, Nanjing with an area of 20000 square meters, mainly manufacturing heat exchangers; ... 36, Runqi Road, Jiangning, Nanjing with an area of 4000 square meters, mainly producing refrigeration units). ... : 12*280ML Comstar tracer liquid of system with leak-off orange boiling point