83/4"HS642XA API And ISO Steel Body PDC Drill Bit For Oil Well Drilling
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83/4" HM662XA PDC τρυπάνι λίγο, να PDC κόφτη για εξόρυξη μηχανήματα Bits/Oilfield PDC τρυπάνι Bit/διάτρηση καρβιδίου εξέδρες PDC τρυπάνια |
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91/2" HM652XAG producerar volframkarbid fem vingar Matrix kroppen diamant Cutter Pdc borr |
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