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22 май 1933 г. - Howard Hughes/drill bit.

Описание:

The company was established in December 1908[1] as Sharp-Hughes Tool Company when Howard R. Hughes Sr. patented a roller cutter bit that dramatically improved the rotary drilling process for oil drilling rigs

Добавлено на ленту времени:

New timeline

ByJaylen Soto
9 мар 2018

Дата:

22 май 1933 г.
Сейчас
~ 91 г назад
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