precoat

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

介绍江苏省内精密过滤的使用情况,对比不涂和涂过滤的特点。

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.

回顾机交涂层铝散片的研究概况，介绍6种类型涂层散片材料的基本情况以及亲水性涂膜散片的应用效果。提出该课题今后的研究方向。