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S Geobore Diamond Core Bit Specifications Item No OD OF THE BIT ID OF THE BIT Reaming Shell mm mm mm AQ 47.5~47.75 26.85~27.1 AQ 47.88~48.13 BQ 59.44~59.69 36.27~36.52 BQ 59.82~60.07 NQ 75.19~75.44 47...