Процесс бурения скважины лопастным долотом
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![Бурение. Геологоразведка // Познавательный фильм [12+]](https://sun9-45.userapi.com/cJRhSt8B4T4Nw24lQqAow96DhtwAjnJpvm8RSQ/sjma9Bzp2Xg.jpg)
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