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1929年5月1日

1分钟阅读

工程师是否警觉？

列车控制装置会在任何情况下，如果工程师未能响应信号，则自动停止列车

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This article was originally published with the title “Is the Engineer Alert?” in 大众科学 Magazine Vol. 140 No. 5 (May 1929), p. 434
doi:10.1038/scientificamerican0529-434

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