Drill head for sleeve milling gas releasing tube effeciently

The utility model discloses a high-efficiency casing milling air discharging pipe casing taking drilling bit, which consists essentially of a body of a cirque column shape. The utility model is characterized in that the middle and upper parts of the internal wall of the body are fixed with a lifting...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	XIANCHENG XIA, LIPING HAN
Format:	Patent
Sprache:	eng
Schlagworte:	BORING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS TRANSPORTING TURNING
Online-Zugang:	Volltext bestellen
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