Temporary support in pit

The utility model discloses a temporary support in pit, prop up the guard bar including a column, the both ends of this column guard bar set up a square backplate, arrange the upper and lower hollow hole of having a perfect understanding in the middle of this column guard bar, and the guard bar is p...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LIU FANGQIU, XIAO XUFENG, LI HUIHUI, HUANG ZHI, PENG JUN, ZOU SHANG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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