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This product is informed to the safe place with laser point in emergency situations. Unlike what you see at ordinary times,
Red lasers, can't go to the fire dangerous place and Green laser can to allow the evacuation more rapidly through a safe place.
Only single product in one wall and met across a laser on the corners of no directions. It gives me the safe place.
kyungsung university
Busan, South Korea
Kim Myeoungsoo,
kyungsung university
Kyung Juyoung,
kyungsung university
Kim Minji,
kyungsung university
Choi Yoon,
kyungsung university