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

1.介绍江苏省内精密过滤器的使用情况,对预涂和预涂过滤器的特点。

2.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.

2.顾空调机热交换器预涂热片的研究概况，介绍6种类型预涂热片材料的基本情况以及亲水性预涂膜热片的应用效果。提出该课题今后的研究方向。