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Subjects
Mine ventilation, Coal mines and mining, Concrete stoppings (Mining), Testing, Airtightness, Analysis, Colorado, Combustion gases, Concrete construction, Design and construction, Equipment and supplies, Measurement, Mine dusts, Mine fires, Mine gases, Mine roof control, Mine shafts, Mining machinery, Numerical calculations, Paonia Region, Safety measures, Sealing compounds, Sulfur hexafluoride, Sulphur hexafluoride, Tracers (Chemistry)ID Numbers
- OLID: OL887013A
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| August 23, 2008 | Edited by RenameBot | fix author name |
| April 1, 2008 | Created by an anonymous user | initial import |