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随着信息量的急剧增长,需要保存的文献资料越来越多,查阅也日益繁琐。自六十年代以来,缩微技术得到了迅速的发展,通常采用
With the dramatic increase in the amount of information, more and more documents need to be saved, and access is becoming more and more cumbersome. Microfinery has been rapidly developed since the 1960s and is commonly used