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设置在高层建筑一层内的燃气锅炉房,下面做法哪一条是多余的 ?

A、靠外窗布置
B、设直接对外的安全出口
C、对外出口门为甲级防火门
D、外墙开口上方设防火挑檐
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正确答案:

C

答案解析:

暂无解析

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