... Freezing 4. Lasting Bubble Nanjing JLHB Environmental Technology Development Co., Ltd is specialized in refrigeration equipment production in east China ... , Nanjing with an area of 20000 square meters, mainly manufacturing heat exchangers; another is in No.36, Runqi Road, ... has branch companies in Shanghai, Guangzhou, Shenyang, Hefei, Wuhan, Changzhou etc. Our two main products are all authorized the ...