4. Boring or penetrating the earth
  5. Processes

Nippon Diamond Co., Ltd.

Corporate Assignee

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Corporate Assignee

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Abrasive and boring method using the same

Boring or penetrating the earth – Processes
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Drilling device and drilling method

Boring or penetrating the earth – Processes
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Drilling device and drilling method

Boring or penetrating the earth – Processes
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Tool device, and method for drilling

Cutting by use of rotating axially moving tool – Processes – Bit detachable
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