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→Historical development
==Historical development==
==Historical development==
发展史
===[[William Thomson, 1st Baron Kelvin|W. Thomson, Baron Kelvin]]===
===[[William Thomson, 1st Baron Kelvin|W. Thomson, Baron Kelvin]]===
William Thomson, later Baron Kelvin, (1852 a, 1852 b) wrote
William Thomson, later Baron Kelvin, (1852 a, 1852 b) wrote