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PCE
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CPC Subgroup
E21B 10/36

Percussion drill bits ( characterised by wear resisting parts E21B10/46)

Full Title

Drill bits (specially adapted for deflecting the direction of boring ; with means for collecting substances E21B27/00) > Percussion drill bits ( characterised by wear resisting parts E21B10/46)

2 direct subcodes

Child Classifications

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  • E21B 10/38 characterised by conduits or nozzles for drilling fluids
  • E21B 10/40 with leading portion