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  • curprev 06:13, 25 September 2021‎ T talk contribs‎ 1,816 bytes +1,816‎ Reconstruction of the ancient magnetic compass <ref> https://www.whatchina.cn/four-ancient-inventions-in-ancient-china.html Four Ancient Inventions In Ancient China. by Jerry.P 2019-09-26 1.Invention magnetic needle China is recognized in the world as...
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