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Feb 20, 2017

Wheelchair on flat ground or small slope and a small Ridge and furrow not too difficult, in the face of few steps could do nothing. Muscle defects under this people is a challenge. People's demand for daily necessities, there is an urgent need to get wheelchairs up and down stairs. So, from a man climbs a ladder, Lenovo and the step-ladder is designed wheelchair; from the armoured vehicle [tank] cross-country, transplanted to the wheelchair up and down the stairs; Exchange and many other Star wheel ladder form. In China, many from required and invented beijingtongxian Lee star wheel, wheel of Qingdao and Guangzhou Huang Hua Lu Tieshu

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