Ihe ngosi nke 12th International Building and Decoration Materials Expo emere na Kunming, Yunnan site na Julaị 29 ruo 31, 2021. E kewara ihe ngosi a n'ime ụlọ teknụzụ mmiri obodo, ọnụ ụlọ ike ndụ ndụ, ụlọ ihe anaghị egbochi mmiri polymer, ụlọ ụlọ sayensị na teknụzụ, ọnụ ụzọ. .
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