Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
Inventor
active
Apparatus for making-up and breaking threaded pipe connections
Core drilling tool with direct drive
Double acting shock absorbers for drill strings
Method of and tool for rolling a workpiece, and arrangement...
Nozzle retention system for a drill bit
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Profile ID: LFUS-PAI-P-173455