... centrex Centralized Extension System 集中式用户专用交换机 centralized alarm system 集中报警系统 centralized AC system 集中式空调系统 ...
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centralized surveillance and alarm system 中央监控及警报系统
centralized alarm system
集中报警系统
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Monday morning around 5 am I was awoken by the scream of a carbon monoxide alarm in my centralized alarm system, letting me know the battery backup was failing.
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