Speical wheelchair helps the elderly climb stairs
(chinadaily.com.cn) Updated: 2012-07-23 13:57
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Tracks of the stair-climbing wheelchair system are seen in this picture taken on July 22, 2012. [Photo/Xinhua] |
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A researcher shows the power system of the stair-climbing wheelchair, Hangzhou, Zhejiang province, July 22, 2012. [Photo/Xinhua] |
