To improve thermoresistance, weather resistance, water resistance, gloss, electric properties.

提耐热性，耐候性， 防水性，光泽度，电性。

At last, heat economy features of in-and-out dirt thermoresistance of air-cooling condenser heat sink pipe were calculated by programming.

最后,编程计算分析了空冷凝汽器散热器污垢热阻的热经济性特性。