I thought back to the periodic interruption I'd grown up with in the mid-20th century — the ear-invading tone that was part of the radio and TV "emergency broadcasting system" test.
是我回想起我所成长的20世纪中页的耳熟能详的周期性断电，耳边回荡着“备用广播电视应急”测试的声音。
Elv maintenance groups: responsible for the elv work, including fire alarm system, broadcasting system, emergency lighting system, monitoring systems, access control, conference room av system, etc.
弱电维修组：负责全厂弱电工作，包括火灾报警系统，广播系统，应急照明系统，监控系统，门禁系统，会议室影音系统等。
Guangzhou Ling-Electronics is a smart professional in broadcasting, digital IP network radio, emergency fire radio, KTV-series card products such as R & D and manufacturing of high-tech enterprises.
广州聆音电子是一家专业从事智能广播、数字IP网络广播、消防紧急广播、KTV卡包系列等产品研发与制造的高科技企业。
The last, it is the replacing broadcasting. When an emergency condition happens, it can be replaced by the program that we have prepared and the continuity of TV program can be maintained.
最后是垫片播出，在直播现场有异常情况的时候，用事先准备好的内容替换录入的现场信号播出，保持播出的连续性。
Chapter 1 focuses on the broadcasting status of public emergency event.
第一章重点关注广播媒体突发公共事件的现状。
Chapter 1 focuses on the broadcasting status of public emergency event.
第一章重点关注广播媒体突发公共事件的现状。
应用推荐