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。
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Experiments show that a surface treatment process forming a protective coating prevents the pit-formation and extends the service lives in se veral folds.
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.