tunnel boring machine cutter bit

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  • JP2004019302A - Tunnel boring machine - Google Patents

    SOLUTION: This tunnel boring machine is provided with the rotary cutter 4 provided at the front part of a boring machine body to excavate a working face; an opening 16 opened in the center part of the rotary cutter 4 in a state of communicating the front and rear; and a percussion drill 17 provided at the boring machine body 3 independently of ...

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  • History - The Robbins Company

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