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22 Mai 1933 Jahr - Howard Hughes/drill bit.

Beschreibung:

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

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ByJaylen Soto
9 Mär 2018

Datum:

22 Mai 1933 Jahr
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~ 91 years ago
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