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18 September 2067 - 7 January 2069 Launch sections of the ring into orbital location and assembly of the two rings (18 сент 2067 г. – 7 янв 2069 г.)
Добавлено на ленту времени:
30 ноя 2019
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Дата:
18 сент 2067 г.
7 янв 2069 г.
~ 1 years and 3 months
