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16 h 28 abr 1850 ano - Discovery of how to make efficient steel

Descrição:

| WHO: | both Henry Bessemer in England and William Kelly in US | HOW: | blasting air through molten iron makes good steel

Adicionado na linha do tempo:

AP US History

10 mai 2018

1

0

1508

Data:

16 h 28 abr 1850 ano

Agora

~ 175 years ago

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