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

Peter B. Dowden

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Shaft boring machine and method

Boring or penetrating the earth – With below-ground tool drive prime mover – With below-ground feed means
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Tunneling machine having liquid balance low flow slurry system

Mining or in situ disintegration of hard material – Hard material disintegrating machines – With mine roof-supporting means
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Profile ID: LFUS-PAI-P-1171924

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