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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"It blows my mind because you think 'if you just drive 30 minutes down the road, Lancashire is a major hub of manufacturing that's still going on now, people are producing things here'."
A large part of the appeal of micro-dramas is seeing and interacting with real actors, she said, because the actors are often unknown and, therefore, accessible on social media.，更多细节参见Line官方版本下载