A.离子感烟 B.差定温 C.火焰 D.点型感烟
A.0.7m,1.5m B.0.7m,1.2m C.0.5m,1.5m D.0.5m,1.2m
A.联动 B.自动 C.手动 D.电动
A.倾斜 B.垂直 C.水平 D.相交
A.1个 B.2个 C.3个 D.5个