2 3/8″ NEW 621 Tricone Drill Bit A-ROD Construction, Geotechnical, Geothermal, Industries, Mining, Oil and Gas, Waterwell Skills Posted on July 22, 2021 ← 17 1/2″ NEW 637/547/517 Tricone Drill Bit 7 5/8″ API 2 1/2″ NEW 621 Tricone Drill Bit A-ROD →
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