A Tribute to Big Bertha: A 25,000 HP Mechanical Worm Designed in Japan for American Drilling.
https://www.autoevolution.com/news/big-bertha-a-25000-hp-mechanical-worm-designed-in-japan-for-american-drilling-139612.html
#HitachiZosen #BigBertha
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A Tribute to Big Bertha: A 25,000 HP Mechanical Worm Designed in Japan for American Drilling.
https://www.autoevolution.com/news/big-bertha-a-25000-hp-mechanical-worm-designed-in-japan-for-american-drilling-139612.html
#HitachiZosen #BigBertha