関連ワード:  class a class b class c class d fire extinguisher    what type of fire extinguisher is suitable for electrical fires class a class b class c class d    which class of fire extinguisher should be used on a grease fire class a class b class c class d    class a class b class c range    class a vs class c fire extinguisher    class a vs class b fire extinguisher  
結果 : class a class b class c class d fire extinguisher