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Melhora na resistência (6 nov 1970 año – 12 sept 1980 año)

Descripción:

Introdução do concreto reforçado com fibras e de concretos de alta resistência.

Añadido al timeline:

Historia do cimento

9 nov 2017

0

0

873

fecha:

6 nov 1970 año

12 sept 1980 año

~ 9 years and 10 months

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