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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Cllr Susan McGill said: "We can't wait to welcome fans and artists to our amazing city for an unforgettable celebration of world-class live music set to the stunning backdrop of Stirling Castle.，更多细节参见服务器推荐
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Source: Computational Materials Science, Volume 267