烟管式火灾报警系统
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烟管式火灾报警装置
smoke vent system
排烟系统
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Adopting the direct vent system could emit smoke to outdoor, you can save the cost of the installation of pipeline integrity of the chimney.
采用把废气排到室外的水平排烟系统，您可节省安装完整烟囱管道的费用。
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And the system's underground vent system, designed to suck away smoke, isn't working.
NPR: Berlin's Airport Project Delays Shame Germans
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