precoat

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

江苏省内精密过滤器的使用情况,对比不预涂和预涂过滤器的特点。

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.

回顾空调机热交换器预涂层铝散热的研究概况，6种类型预涂层散热材料的基本情况以及亲水性预涂膜散热的应用效果。提出该课的研究方向。

This article expounds the in fluences from the aspects of precoating photosensitiser coating anddrying process on the quality of diazo paper.

本文以予涂,感光液涂布及干燥三方面工艺论述对晒图纸质量的影响。