30 jun 1439 año - Invention of the Printing Press Circa 1439
Descripción:
 A printing system which adapted existing technologies to printing purposes. Printing in The most important innovation was the development of hand-molded metal printing matrices. It made possible the precise and rapid creation of metal movable type in large quantities. The hand mould and the printing press, together drastically reduced the cost. 
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fecha:
30 jun 1439 año
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 ~ 586 years ago