precoat

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

介绍了江苏省内精密器使用情况,对比了不预和预器特点。

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.

回顾了空调机交换器预层铝散片概况，介绍了6种类型预层散片材料基本情况以及亲水性预膜散片应用效果。提出了该课题今后方向。