The characteristics of filter between no precoat and precoat were compared.

介绍了江苏省内精密过滤的使用情况,对比了不过滤的特点。

Studies on heat exchanger aluminum fin precoat of air conditioner were reviewed. Six types of precoat as well as the application of hydrophilic precoat were described.

顾了空调机热交换层铝散热片的研究概况，介绍了6种类型层散热片材料的基本情况以及亲水性膜散热片的应用效果。提出了该课题今后的研究方向。