短語詞組短語fire resistance rating 耐火等級;耐火極限;防火等級;火等級fire danger rating division 火險等級分區(qū)fire suppression rating schedule 滅火條件分級制fire protection rating 耐火等級fire retardant rating 耐火等級測定fire insurance rating 火災(zāi)保險級別Forest Fire Danger Rating 森林火險等級fire danger rating zoning 火險區(qū)劃fire resistant rating 防火等級 返回 fire rating