以各可燃物类型的初始引燃含水率为基准，将各可燃物类型的火险等级划分为五级。

Five fire danger ratings of fuel types were classified on the basis of initial ignition moisture.

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以各可燃物类型的初始引燃含水率为基准，将各可燃物类型的火险等级划分为五级。

Five fire danger ratings of fuel types were classified on the basis of initial ignition moisture.

youdao