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jan 1, 200 BC - W: First known use of smelted iron to create steel.

Description:

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 Jul 2019

2

0

1443

Date:

jan 1, 200 BC

Now

~ 2227 years ago

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