尺寸规范：参赛作品须基于正方形模版，长宽为 188.1mm，并在四周包含 φ9.05mm 的圆角。你可以通过 本链接 获得官方尺寸示意图。
developed by an IBM researcher named Horst Feistel. Feistel, for silly reasons,
。关于这个话题，safew官方版本下载提供了深入分析
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He suggests that the smoke alarm industry has a responsibility to reduce nuisance alarms, which sometimes cause people to deactivate or uninstall the devices – a huge safety risk.