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The photo taken on May 9, 2014 shows a removable mist cannon which can reduce dust in air working on a street in Xi'an, Shaanxi province. (Photo source: cnwest.com)
The photo taken on May 9, 2014 shows a removable mist cannon which can reduce dust in air working on a street in Xi'an, Shaanxi province. (Photo source: cnwest.com)
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