If the suction system detects any smoke gas, it automatically alerts the fire department.

如果吸烟系统检测到任何烟雾气体，它会自动向消防部门发出警报。

Here under the roof were installing a smoke suction system, a smoke detector would take too long to sense a fire from the ground level.

在屋顶下安装了吸烟系统，烟雾探测器需要很长时间才能从地面探测到火灾。