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Cooling grid main are seamless steel pipes and copper pipes of the two, there are some disadvantages due to material issues. When used in steel and brass tube, tube inner and outer side heat transfer coefficient of disparities resulting in material waste. High cost of copper tubes, pipe is clean is difficult to ensure, and evaporator too much weight, cold storage building construction costs increase, many undesirable factors restricting its development. Patented aluminum row can not only solve the above problems, and have better performance.