4. Seal for a joint or juncture
  5. Seal between relatively movable parts
  6. Circumferential contact seal for other than piston

Egbert Helmig

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Device for cleaning an inner pipe inserted into a gas or oil...

Wells – Whirling or lateral discharge or projectable nozzles – Rotary or projectable
Reexamination Certificate

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Sealing device

Seal for a joint or juncture – Seal between relatively movable parts – Circumferential contact seal for other than piston
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2813351

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