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When people who lift something go up and down the stairs in condition of not securing a view, they may lose their footing.
So they need a kind of alarm that makes people perceive both beginnings and endings parts of stairs.
"Tick Tock Plank" will help people notice both parts of stairs by making a sound like the Air horn.
Cheonan-si, Chungcheongnam-do, South Korea
Changwon-si, Gyeongsangnam-do, South Korea
Cheonan-si, South Korea