precoat

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

介绍了江苏省内精密的使用情况,对比了不预和预的特点。

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.

回顾了空调机热交换预层铝散热的研究概况，介绍了6种类型预层散热材料的基本情况以亲水性预膜散热的应用效果。提出了该课题今后的研究方向。

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,感光液干燥三方面工艺论述对晒图纸质量的影响。