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

介绍了江苏省内精密的使用情况,对比了不预涂和预涂的特点。

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.

顾了空交换预涂层铝散片的研究概况，介绍了6种类型预涂层散片材料的基本情况以及亲水性预涂膜散片的应用效果。提出了该课题今后的研究方向。