12th Beijing Int'l Sci-Tech Expo Opens
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A Chinese staff shows off remot-controlled robots at the 12th Beijing International Science and Technology Exposition held in Beijing, on May 20, 2009. [Xinhua] |
A working staff shows a visitor how to drive a mini three-wheel vehicle driven with electric power at the 12th Beijing International Science and Technology Exposition held in Beijing, on May 20, 2009. [Xinhua]
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