Borehole
A borehole is a narrow shaft drilled into the ground, either vertically or horizontally. Boreholes range from shallow holes just a few feet deep to engineered shafts extending hundreds or even thousands of feet underground.
A borehole is a narrow shaft drilled into the ground, either vertically or horizontally. Boreholes range from shallow holes just a few feet deep to engineered shafts extending hundreds or even thousands of feet underground.
A borehole is a narrow shaft drilled into the ground, either vertically or horizontally. Boreholes range from shallow holes just a few feet deep to engineered shafts extending hundreds or even thousands of feet underground.
Source: Wikipedia "Borehole" · CC BY-SA 4.0
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