4. Pipe joints or couplings
  5. End to side or plate
  6. Swivel with lateral port to annular sleeve

Central Mine Equipment

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Assembly structure for a soil sampler

Joints and connections – Structurally installed in diverse art device
Patent

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Hollow auger head assembly

Boring or penetrating the earth – Bit or bit element – Core forming type
Patent

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Kelly bar coupling

Tool driving or impacting – Impacting devices – With means for rotating tool
Patent

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Side feed water swivel

Pipe joints or couplings – End to side or plate – Swivel with lateral port to annular sleeve
Patent

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