An diofar eadar na mùthaidhean a rinneadh air "640an"

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b robot Adding: kv:640-ӧд вояс
Loidhne 49:
[[ko:640년대]]
[[ksh:640-er Joohre]]
[[kv:640-ӧд вояс]]
[[la:Decennium 65]]
[[mk:640-ти]]