Coal mine roof cutting entry retaining energy gathering device

The invention relates to a coal mine roof cutting entry retaining energy gathering device which comprises an energy gathering pipe and an energy gathering cover arranged at the end of the energy gathering pipe. The connecting piece is used for connecting the two adjacent energy gathering pipes, and...

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Bibliographische Detailangaben
Hauptverfasser:	HAO RUNHUA, WEI LEI, WANG LIKUN, WEI HUACHANG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AMMUNITION BLASTING HEATING LIGHTING MECHANICAL ENGINEERING WEAPONS
Online-Zugang:	Volltext bestellen
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