safety status classification 基本例句 安全等级划分 Thesafety status classificationmethod has been established by the safety technology criteria and safety assessment method has been given based on Mond evaluation method also.根据有关规范建立了燃气管网的安全等级划分方法，并采用蒙德评价法建立了燃气管网单元的危险性评价方法。