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

介绍了江苏省内精密滤器的使用情况,对比了不和滤器的特点。

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.

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