4. Boring or penetrating the earth
  5. With signaling, indicating, testing or measuring

Masahisa Sonku

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Anticorrosive liquid tank with offset lining joints

Receptacles – Receptacle having flexible – removable inner liner – Means for venting air trapped between the liner and its...
Patent

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Method of drilling a branch line aperture after internal lining

Boring or penetrating the earth – With signaling – indicating – testing or measuring
Patent

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Rehabilitating underground pipes with expanding helically wound

Pipes and tubular conduits – Repairing – Patches
Patent

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Profile ID: LFUS-PAI-P-1554816

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