✦ LIBER ✦

An entry drifting machine with a hydraulic hammer for cutting hard rocks

✍ Scribed by L. A. Mitin; F. F. Voitsekhovskaya; L. P. Dimova; A. I. Buteev

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Driving horizontal workings by means of

✍ V. V. Gushchin; V. V. Kuznetsov; V. A. Chernikov; A. G. Merzon; Yu. I. Protasov; 📂 Article 📅 1979 🏛 Springer 🌐 English ⚖ 433 KB