THE first of six tunnel boring machines (TBMs) that will excavate around 13 miles of twin-bore tunnels under London was launched on October 6.
Named afterbegan its dig towards Greenford from West Ruislip.
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THE first of six tunnel boring machines (TBMs) that will excavate around 13 miles of twin-bore tunnels under London was launched on October 6.
Named afterbegan its dig towards Greenford from West Ruislip.
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Lives of the Engineers (Barnes & Noble Digital Library): George and Robert Stephenson
bySamuel Smiles