✦ LIBER ✦
Optimum air pulsation time in intermittent ventilation of blind workings
✍ Scribed by G. V. Pol'shchikov
- Publisher
- Springer
- Year
- 1984
- Tongue
- English
- Weight
- 231 KB
- Volume
- 20
- Category
- Article
- ISSN
- 1573-8736
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