4. Rotary kinetic fluid motors or pumps
  5. Working fluid passage or distributing means associated with...
  6. Plural rigidly related blade sets

Hugh D. Nelson

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Bore hole pumps

Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Plural rigidly related blade sets
Patent

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Well packer

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
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Profile ID: LFUS-PAI-P-777800

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