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中国汉代发明的水碓和十一世纪欧洲水力锻锤既然设计原理一样 为什么中国没把它用于锻...
source link: https://www.zhihu.com/question/314605262/answer/615337357
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谢邀汉代的水碓（有可能时间更早，只是最早的文字描述来自汉代）与欧洲的水力锤锻设计原理确实是一样的，…
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