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The steam shovel is invented and eventually becomes instrumental in mechanizing surface coal mining. (30 янв 1839 г. – 17 ноя 1970 г.)
Добавлено на ленту времени:
coal timeline
By
hose
8 дек 2017
0
0
379
Дата:
30 янв 1839 г.
17 ноя 1970 г.
~ 131 years
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