Tunnels
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SEMMENS, Peter & MACEFERT-TASSIN, Yves
Channel Tunnel Trains - Channel Tunnel rolling stock and the Eurotunnel system
WALKER, Thomas A.
The Severn Tunnel - Its Construction and Difficulties (1872 - 1887)
WILSON, John C.; WEBB, Francis W.; GEACH, J.; HURRY RICHES, T.; FROUDE, William & FELL, John C.
Safety Valves / Slide Valves / Severn Tunnel / Tynewydd Colliery
Institution of Mechanical Engineers Proceedings - July 1877
Extract of IME proceedings featuring papers including safety valves, slide valve, Severn Tunnel and Tynewydd colliery - see next page for full titles. With twenty-five plates to the rear.
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