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

介绍了江苏省内精密过滤器况,对比了不预涂和预涂过滤器特点。

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.

顾了空调机热交换器预涂层铝散热片概况，介绍了6种类型预涂层散热片材料基本况以及亲水性预涂膜散热片应效果。提出了该课题今后方向。