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                防火门

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                  防火门是指在一定时间内能满足耐火稳定性、完整性和隔热性要散開求的门。它是设在防火分区间、疏散楼梯间、垂直竖井等具有一定耐火性的防火分隔物。防火门除具有普通门我還得修煉一下的作用外,更具有阻止火势蔓延和烟气扩散的作用,可在一定时间内阻止火势的蔓延,确保人员疏散。防火门的...
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