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PCE
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DIFF Subgroup
E21B 10/04

with core destroying means

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Drill bits > Core bits > with core destroying means

CPC:

Drill bits (specially adapted for deflecting the direction of boring ; with means for collecting substances E21B27/00) > Core bits (characterised by wear resisting parts E21B10/48) > with core destroying means

No child classifications to compare. This is a leaf node in both IPC and CPC.