发布时间:2025-01-29 23:39:52
【答案】:C
2021/2020版教材P8
设置防火墙确有困难的场所,可采用防火卷帘作防火分区分隔。钢质普通型防火卷帘(单层)耐火极限为1.5-3.0h,钢质复合型防火卷帘(双层)耐火极限为2.0-4.Oh;无机复合防火卷帘(多种复合材料)耐火极限为3.0-4.Oh,无机复合轻质防火卷帘(双层,不需水幕保护)耐火极限为4.Oh。新教材内容有改动
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