名词中文翻译
中文翻译：耐火等级
同义词：
['fire resistance class', 'fire resistance grade']
例句：
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1. The building hasa fire resistance rating of Class B.
这座建筑的耐火等级为B级。
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2.The new fire safety regulations require all buildings to have a fire resistance rating of at least Class A.
新的消防安全规定要求所有建筑物的耐火等级至少为A级。
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3.The engineers carefully checked the fire resistance rating of the new fire-resistant materials.
工程师们仔细检查了新型防火材料的耐火等级。