8 1/2" FG515G Tricone Drill Bit , Water Well Drill Bits API-7-1 Standard
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8 1/2" FG515G , TCI Bit Sealed Roller Bearing , Tricone Roller Bit PRODUCT SPECIFICATIONS Bit Size : 8 1/2 inch (215.9mm) IADC : 5 1 5 SERIES : FG ...
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