4. Rotary expansible chamber devices
  5. Unlike helical surfaces on relatively wobbling rotating...

Melvin D. Mendenhall

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Carbide or boride coated rotor for a positive displacement motor

Rotary expansible chamber devices – Unlike helical surfaces on relatively wobbling rotating...
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High performance overlay for rock drilling bits

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
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Profile ID: LFUS-PAI-P-1442524

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