A、火災(zāi)探測器 B、火災(zāi)報(bào)警裝置 C、火災(zāi)警報(bào)裝置 D、火災(zāi)報(bào)警按鈕
A.15m B.20m C.25m D.30m
A.10m B.12m C.14m D.15m