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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在本代机身的周边细节和外观上，三星也做了一道艰难的加减法。，推荐阅读服务器推荐获取更多信息
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