Experiments show that a surface treatment process forming a protective coating prevents the pit-formation and extends the service lives in se veral folds.
试验已经充分证明：气阀上采用一种表面处理方法所得到的涂层可以有效地减少并推迟“麻坑”的产生，数倍地提高了使用寿命。
This paper analyzes the failure character and failure reasons of the reinforced concrete columns and presents se veral methods of strengthening the reinforced concrete columns.
本文分析了钢筋混凝土柱的破坏特征及其破坏原因，并分别介绍了几种常用的加固混凝土柱的方法及其构造与施工要求。
In order to control frequent element deficiency diseases, effects of spraying nutrient elements on Pistacia veraL.
为防治大棚育苗期间阿月浑子常见的各种缺素症，进行了营养元素喷施试验。
In order to control frequent element deficiency diseases, effects of spraying nutrient elements on Pistacia veraL.
为防治大棚育苗期间阿月浑子常见的各种缺素症，进行了营养元素喷施试验。
应用推荐