... 0.3mm cold-rolled steel from China, from film to 3.2mm, was spiral, the fin-tube surface ... eight, and other types of scheduling, work pressure, heat transfer media for the following 2.0MPm, the temperature ... characteristic, the pattern, the piece thick, the piece high, the piece distance, Characteristics of the tube,the ... thickness, sixth row thickness, eight row thickness Air Heat Exchanger--- GLII