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Bulgarian

Така например в Африка народите банту добиват и използват калая между 11-ти и 15 век, в Америка добивът му започва около 1000 г., а в Австралия – около 17 век.

English

In Africa, the Bantu culture extracted, smelted and exported tin between the 11th and 15th centuries AD, in the Americas tin exploitation began around 1000 AD, and in Australia it began with the arrival of Europeans in the 17th century.