What are the application fields of your products? (1) Air-conditioning and HAVC industrial: As evaporator, condenser, supper heater, sub cooler, oil cooler, heat recovery and economizer. (2) Chemical Industrial: Heating and Refrigerating process, evaporation or condensation process. (3) Metallurgy industrial: Rolling mill. Cast machine, oxygen machine, hydraulic/lubricant, cycle cooling water (4) Power industrial: Transformer oil cooler, etc (5) Textile and paper industrial: Waste gas, liquid hear recovery (6) District Heat: Sub-station for heating system, heating recycle water heating