建筑外峭的保温系统采用燃烧性能为B1的保温材料作防护层时,防护层的厚度
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A.5
A.5
A.5
B.8
B.8
B.8
C.10
C.10
C.10
D.12
D.12
D.12
参考答案:
A.5
A.5
A.5
B.8
B.8
B.8
C.10
C.10
C.10
D.12
D.12
D.12
参考答案: