関連ワード:  class a and c fire extinguisher    class a b and c fire extinguisher    a class c fire extinguisher is used for    class b and c fire extinguisher used for    a class c fire extinguisher is designed to be used on    a class c fire extinguisher is used for flammable combustible liquids    a class c fire extinguisher should be used    class c fire extinguishers can be used on    class c fire extinguisher contains    class c fire extinguisher symbol