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gong neng du te de ge zhong zhi
Author(s): 
Pages: 19-20
Year: Issue:  10
Journal: Encyclopedic Knowledge

Abstract: <正>纸是我国古代四大发明之一,自从蔡伦发明造纸术以来,纸伴随着人类的文明,已经历了上千年的历史变迁。随着社会的发展,纸的种类越来越多,纸的功能也越来越新奇。避水纸传统的纸最怕水浸,一份重要的文件,如果遭到水浸就损坏了,这让人们十分头痛。为此科
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