This system fire prevention broadcast part is the mainlinesystem, 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。
2
The main valve and pilot system can be serviced without removing the valve from the line.
不需要从管线上拆卸阀门，就可以对主阀和引导系统进行维修。
3
This paper introduces a familiar kind of computer control system for convolute product line, and discusses its composition, main function and implementation method.