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    Meet Crossrail's giant tunnelling machines - YouTube. Dec 05, 2012 · Crossrail will use eight tunnel boring machines (TBMs) to construct the new tunnels under London.

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    The Best Products for Tough Jobs You won't be alone when you buy a Robbins TBM. If you are planning to tunnel through rock, you want a TBM from a manufacturer who will support you as your partner throughout the project, anywhere in the world.

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    Tunnel warfare - Wikipedia. Tunnel warfare is a general name for war being conducted in tunnels and other underground cavities. It often includes the construction of underground facilities (mining or undermining) in order to attack or defend, and the use of existing natural caves and artificial underground facilities for military purposes.

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    With more than six million kilometers of highways and 240,000 kilometers of railways snaking across the United States, life above ground has become increasingly congested.

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    What is the mysterious 'unknown object' blocking progress of huge drilling machine boring out new highway below Seattle? The highway tunnel is being dug 45 feet below ground

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    Application of Tunnel Boring Machines in Underground Mine Development M. Cigla, S. Yagiz & L. Ozdemir

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