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2016-06-29
On 4th August, 2011, Dayan attended the China International Expo for Roofing& Building Waterproofing
2016-06-29
On 8th August, 2011, Dayan successfully applied the patent for closure polymer cement concrete waterproofing material
2016-06-29
On 7th September, 2011, Dayan attended the Fourth International Conference on Green Building and Energy-Efficient.