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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
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1 janv. 1750 - 英国的米切尔设计测静电力扭秤,并提出磁力的平方反比定律
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lee66
29 mars 2024
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Date:
1 janv. 1750
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~ Il y a 275 ans
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