Foldable air duct extension device

The utility model relates to the field of cavern blasting, and discloses a foldable air duct extending device which comprises a sliding telescopic rod arranged at the top of an excavated cavern, and the sliding telescopic rod comprises a sleeve section and a sliding section telescopically arranged i...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	XIAO YINGFENG, YANG ZHIYONG, NA XIAOPING, OUYANG JIAN, LIU WENBO, ZHONG LIN, ZOU JIAYU, CHEN YANG, LIU WENMING, SONG ZEKUI, FENG JUNHUAI, XU FANGBO, HAO LIJUN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS MINING SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS
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