긴급 대피를 위한 대한민국 혁신 화재 탈출 비법 | 안전한 생명 구하기
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Genius Fire Escape System
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South Korean company has developed Magic Escape Stairs. It looks like an ordinary balcony, but in the event of an emergency, activating the system deploys escape ladders down.
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@ user-vd6ys4rw8r / YT
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