4. E - Fixed Constructions
  5. 21
  6. B

James W. (jr.) Langford

E - Fixed Constructions – 21 – B

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Asymmetric gage insert for an earth boring apparatus

E - Fixed Constructions – 21 – B
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Asymmetric insert for inner row of an earth boring cutter

E - Fixed Constructions – 21 – B
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Vacuum, vacuum-pressure, or pressure reverse circulation bit

E - Fixed Constructions – 21 – B
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Profile ID: LFCA-PAI-P-87194

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