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20 ноя 1908 г. - Howard hughes drill bit
Описание:
Howard Hughes files the basic patents for his rotary drill. Breaking through rock would never be easier.
Добавлено на ленту времени:
The Industrial Timeline
By
Cameron Shields
8 мар 2018
0
0
271
Дата:
20 ноя 1908 г.
Сейчас
~ 115 г назад
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