There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.
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Раскрыты подробности о договорных матчах в российском футболе18:01
“한국은 ‘얼죽아’의 본고장”… 스타벅스, 韓서 세계 최초 ‘에어로카노’ 출시，推荐阅读safew官方版本下载获取更多信息
（三）一方采取胁迫手段，迫使对方订立仲裁协议。