Closed support

The patent of the utility model relates to a closed support. What this supporting construction mainly included upper portion u type steel fiber concrete steel pipe and lower part prevents the pucking structure. Wherein upper portion u type steel fiber concrete steel pipe mainly is that to pour into...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	WANG ZHONGYUAN, WEI XUNHE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
Online-Zugang:	Volltext bestellen
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