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1 gen 1824 anni - "Roomalaisen betonin" paluu

Descrizione:

https://en.wikipedia.org/wiki/Joseph_Aspdin

Joseph Aspdin patentoi Porlandin sementin

Aggiunto al nastro di tempo:

Kaiken historia

17 giorni fa

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Data:

1 gen 1824 anni

Adesso

~ 201 years ago

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