世界上没有任何争论(除埃及外)。
见美国造纸研究所(造纸博物馆)的连接。
http://ipst.gatech.edu/amp/exhibits/museum_invention_paper.htm
世界上没有任何争论(除埃及外)。
见美国造纸研究所(造纸博物馆)的连接。
http://ipst.gatech.edu/amp/exhibits/museum_invention_paper.htm
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