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We usually work on ladders when you want to move the location, it is necessary to move the ladder very troublesome if we Can operate in the ladder, you will save time and effort. Pull and rotate the handle, enables mobile ladders;Press the handle,a fixed ladder.This can be achieved on the ladder controls the direction of the movement of hands and the ladder,walking down and move the ladder.Save time and energy.
Wang Yufang Xu Xiaobo