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IPC Main Group
E21B 3/00

Rotary drilling

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
FIXED CONSTRUCTIONS
Class:
EARTH OR ROCK DRILLING; MINING
Subclass:
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

Related Keywords

drilling machines or AUGERS for mining or quarrying

1 direct subcode

Child Classifications

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