✦ LIBER ✦
Use of a column-supported artificial roof for rock pressure control in working thick steep coal seams by inclined slices
✍ Scribed by V. F. Kvasnikov; V. V. Ryzhkov
- Publisher
- Springer
- Year
- 1976
- Tongue
- English
- Weight
- 803 KB
- Volume
- 12
- Category
- Article
- ISSN
- 1573-8736
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