Three quarters of tunnel excavated
TUNNEL boring machines (TBMs) and are beyond three-quarters of the way through creating the twin bores of the 10-mile tunnel that will take
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TUNNEL boring machines (TBMs) and are beyond three-quarters of the way through creating the twin bores of the 10-mile tunnel that will take
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Journey to Crossrail: Railways Under London, From Brunel to the Elizabeth Line
byStephen HallidayEbook
Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. Meadows Division and Harrison Transfer Yard. Paper No. 1153
byE. B. Temple