1920年7月24日

1分鐘閱讀

更好的鋼錠，減少浪費，化學戰勤務學校

作者：A. R. Surface

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大眾科學 Magazine Vol 123 Issue 4This article was originally published with the title “Better Steel Ingots with Less Waste, Chemical Warfare Service School” in 大眾科學 Magazine Vol. 123 No. 4 (), p. 83
doi:10.1038/scientificamerican07241920-83a
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