How realizes the question which this part of teaching all is urgent needs to solve.
如何实现这部分教学都是迫切需要解决的问题。
This system fire prevention broadcast part is the main line system, realizes the background music and the urgent broadcast by the broadcast cut module cuts.
本系统消防广播部分为总线制，由广播切换模块实现背景音乐与紧急广播切换。
This system fire prevention broadcast part is the main line system, realizes the background music and the urgent broadcast by the broadcast cut module cuts.
本系统消防广播部分为总线制，由广播切换模块实现背景音乐与紧急广播切换。
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