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mandown alarm /ˈmandaʊn ɐlˈɑːm/ n

中文：人员倒地报警器

中文 · 人员倒地报警器Español · avisador de alarmaFrançais · avertisseur de détresse
Meaning：Device that emits a strong signal so that a firefighter can be located in a blaze; it is activated by the firefighter or after a 30-second period of immobility.
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Firefighter

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