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jan 1, 1847 - 英国布尔创立布尔代数。德国亥姆霍兹提出势能的概念。确立能量守恒定律。

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1847年英国布尔创立布尔代数。德国亥姆霍兹提出势能的概念。确立能量守恒定律。

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jan 1, 1847

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~ 179 years ago

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