precoat

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

介绍了江苏省内精密过滤器的使用,比了不和过滤器的特点。

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.

回顾了空调机交换器层铝散片的研究概，介绍了6种类层散片材料的基本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。