Zoning of forest fire risk grade is a scientific basis for macro-decision and regional guidance of forest fire prevention.
森林火险等级区划是森林防火宏观决策和分类指导的科学依据。
Quantitative safety assessment on probability of fire and explosion in LPG storage and filling station is done by method of code evaluation combined with risk grade evaluation.
运用规范评价和危险程度评价相结合的方法，对液化石油气储配站发生火灾爆炸的危险性进行了定量安全评价。
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