Fishing cup

The utility model discloses a fishing cup which comprises a core shaft and a cup body, a plurality of convex ribs are arranged on a shaft body in the middle of the core shaft at intervals, external threads are arranged on the convex ribs, internal threads are arranged on the inner wall of the top en...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	HUANG YUN, ZHENG TINGBI, ZHOU JINGREN, HUANG RUIHAI, ZHANG TENGFEI, HU LEI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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