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Free QuoteA tunnel boring machine (TBM) is a machine used to excavate tunnels full face with a circular cross section through a variety of soil and rock strata. ...
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Free QuoteThis is the tunnel-boring machine (TBM) from The Robbins Company. The TBM is 485 tons, 450 feet long, and uses a 22-foot diameter cutterhead to mine 7,789 linear feet in two tunnels. ...
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