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1940年7月1日

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1940年7月工业趋势

作者：菲利普·H·史密斯

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More by Philip H. Smith

This article was originally published with the title “Industrial Trends” in 大众科学 Magazine Vol. 163 No. 1 (July 1940), p. 12
doi:10.1038/scientificamerican0740-12

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