The main reasons are the difference of the method itself and the difference in obtained value theory domain between final safety grade and each level of grade coefficient method.
其主要原因是方法本身存在差别，且等级系数法的最终安全等级取值论域与各层次指标的安全等级取值论域不一致。
The main reasons are the difference of the method itself and the difference in obtained value theory domain between final safety grade and each level of grade coefficient method.
其主要原因是方法本身存在差别，且等级系数法的最终安全等级取值论域与各层次指标的安全等级取值论域不一致。
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