Through large earthquake damage survey, we establish approximatetreatment means on essential condition association coefficient of the same project.
通过对大量地震震害调查，建立了同一工程项目的基本条件关联系数的近似处理方法。
2
The investigation has proved that the ratio of the ferrite to austenite being approximate to 1 in the steel is possible by controlling its chemical composition and heat treatment condition.