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用途:封闭船舶和水上交通工具的内外开口,防止火灾和燃烧产物从起火房间传播到其他房间。类型:0-透气(内外开口);I - 水气密(外开口);按防火和抗烟、火焰渗透的等级:无等级,防火等级A-0、A-15、A-30、A-60;防火型B-0、B-15、B-30。
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