Improvements in or relating to hydropneumatic pit props

911,588. Hydro-pneumatic pit props. NIKEX NEHEZIPARI KULKERESKEDELMI VALLALAT. Nov. 29, 1960, No. 41005/60. Class 20 (2). A hydro-pneumatic pit prop comprises a base 1 for liquid, a working cylinder 4 connected thereto by an intermediate member 3 and an inner tubular member, see Fig. 1 (not shown) w...

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Bibliographische Detailangaben

Hauptverfasser:	DOMOKOS KALMAN, BARSI KAROLY, MONOS RUDOLF, MEZO LASZLO
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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