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A tree blossomed in our garden. Breaking an existing concept of ordinary ladder type, we may scale up the ladder with only repeat motion of pushing upward both sides alternately and climbing up by holding handle with stepping on both sides. Stability was provided by support at the lower, rear part and a slip prevention
device at the upper part.
Yongin-si, South Korea
Suwon, South Korea
So yeong Park Chang jun Lee Mi hwa Lee Ga hye Kang