4. Boring or penetrating the earth
  5. With below-ground tool drive prime mover

Oleg V. Smirnov

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Annular air-hammer apparatus for drilling holes

Boring or penetrating the earth – With below-ground tool drive prime mover
Patent

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Annular air-hammer apparatus for drilling holes

Boring or penetrating the earth – Below-ground impact members – Fluid-operated
Patent

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Method for electrical purification and decontamination of liquid

Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent

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Profile ID: LFUS-PAI-P-1207162

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