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A road sweeper self-styled by workers from a road maintenance company in Dangyang city, Hubei province, March 14, 2012 file photo. Sixteen brooms were attached to a wheel belted to the rear wheels of the truck, so it rotates when the car is driving. The device can sweep a distance of 20 kilometers per day, which is equivalent to 20 workers’ efforts in one day.[Photo/CFP] |
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