4. Boring or penetrating the earth
  5. With magazine for successively moving unconnected, oriented...

Hans Zingl

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Drill pipe handling mechanism

Boring or penetrating the earth – With magazine for successively moving unconnected – oriented...
Patent

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Drill pipe handling mechanism

Tools – Wrench – screwdriver – or driver therefor – Machine
Patent

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Power feed system for a rotary drill

Expansible chamber devices – Mutually relatively movable cylinder or sleeve – member... – Cylinder or sleeve forms working member
Patent

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Profile ID: LFUS-PAI-P-482815

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