4. Wells
  5. Valves, closures or changeable restrictors

Rune Nilsen

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Device for an opening in an outer sleeve of a sleeve valve...

Wells – Valves – closures or changeable restrictors
Reexamination Certificate

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Sleeve valve for controlling fluid flow between a...

Valves and valve actuation – With means to increase head and seat contact pressure – Spring
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2835483

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