单项选择题
A.甲级防火门 B.乙级防火门 C.双向弹簧门 D.玻璃门
A.0.9m B.1.0m C.1.1m D.1.2m
A.12mX12m B.13mX13m C.15mX15m D.18mX18m
A.3.5m;2% B.3.5m;3% C.4.0m;2% D.4.0m;3%
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