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(31st century BC - 30th century BC - 29th century BC - other centuries) (4th millennium BC - 3rd millennium BC - 2nd millennium BC) ----
Events Inventions, discoveries, introductions | ||||||||
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(31st century BC - 30th century BC - 29th century BC - other centuries) (4th millennium BC - 3rd millennium BC - 2nd millennium BC) ----
Events Inventions, discoveries, introductions | ||||||||
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