Tool driving or impacting
Hammer or tool shaft reciprocated by gripping means which...
With fixed means cyclically contacted by grip structure
Inventor
active
Annular air hammer apparatus for drilling wells
Annular air-hammer apparatus for drilling holes
Annular air-hammer apparatus for drilling holes
Clamping attachment to a device for driving rod elements of low
Clamping means for a device for driving flexible rod-shaped elem
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Profile ID: LFUS-PAI-P-930519