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1 янв 200 г. до нашей эры - W: First known use of smelted iron to create steel.

Описание:

World: India was the first known to smelt iron with carbon to create steel, used to make swords, knives, and sewing needles.

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History of Mathematics 2019

16 июл 2019

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1442

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1 янв 200 г. до нашей эры

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~ 2227 г назад

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