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Some smoke alarms have been designed to be ultra-sensitive. Aspirating devices, for example, constantly suck in air in order to detect even small quantities of smoke in a room. They are often used in commercial settings, including server rooms packed with expensive computer tech.
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His business, which he co-founded with colleague Bert de Wit, advises companies on their brand identity and packaging.。关于这个话题，WPS官方版本下载提供了深入分析