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.
The US is a key market though, second only to China by some counts. Last year, Vigloo opened an office in LA. The firm wants to target American women who they believe will spend more than their Korean counterparts.。业内人士推荐51吃瓜作为进阶阅读
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Micro USB port is annoying，这一点在夫子中也有详细论述
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