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情况,对比了不预和预过滤器的特。

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.

了空调机交换器预散片的研究概况，介绍了6种类型预散片材料的基本情况以及亲水性预膜散片的应用效果。提出了该课题今后的研究方向。