✦ LIBER ✦
Relation between forward thrust on a perforator and its characteristics, the bit shape, and the rock-breaking process
✍ Scribed by É. G. Chernilov
- Publisher
- Springer
- Year
- 1970
- Tongue
- English
- Weight
- 300 KB
- Volume
- 6
- Category
- Article
- ISSN
- 1573-8736
No coin nor oath required. For personal study only.