Category:Deep boreholes
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This category has the following 2 subcategories, out of 2 total.
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Media in category "Deep boreholes"
The following 2 files are in this category, out of 2 total.
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Der KTB-Bohrturm (The KTB Drill Rig) - geo.hlipp.de - 5904.jpg 423 × 640; 52 KB
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The deep boring at Spur (1914) (14775922421).jpg 2,796 × 3,648; 1.11 MB