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1921年4月30日

1分鐘閱讀

美國褐煤

加拿大為使褐煤媲美無煙煤開闢道路

作者：Robert G. Skerrett

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This article was originally published with the title “American Lignite Coals” in 大眾科學 Magazine Vol. 124 No. 18 (April 1921), p. 344
doi:10.1038/scientificamerican04301921-344

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