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it is safety ladder that upper and bottom part are fixed. safety ladder has safe points. first point is bottom part which stationally fixes the ladder overall. also, second point is upper part of ladder which props up the first point. when you don’t use the ladder, can fold safety points. it is easy to situationally transform angles. also, you are easy to control the height of upper safety part.
Ewha Womans University
Gyeonggi-do, South Korea
Daye Hwang,
Ewha Womans University
