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20 сент 1000 г. до нашей эры - Abacus and steel

Описание:

The abacus is used as an everyday method of calculation by Phoenicians and Babylonians

Iron reheated with carbon is found to be much harder, being transformed into steel

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Evolution Timeline

ByDalynn Paredes

27 окт 2017

667

Дата:

20 сент 1000 г. до нашей эры

Сейчас

~ 3028 г назад

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