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Rotary flow divider ensures maximum use of horsepower on tunnelling machine
22 November, 1972
BTS - Safety in hard rock tunnel construction
22 November, 1972
At alternative Channel crossing
22 November, 1972
Hong Kong airport road tunnel at Kai Tak
22 November, 1972
Shield tunnelling with Liner Plates
22 November, 1972
New Zealand tunnels for Tongariro power development
22 November, 1972
Hong Kong cross harbour tunnel
22 September, 1972
Undercutting for hard rock runnels
22 September, 1972
St Gotthard road tunnel project the original concept and design (Part 1)
22 September, 1972
The Three Valley aquduct in tunnel
22 September, 1972
Japan-Seikan tunnel contracts
22 September, 1972
Tunnels in earthquake areas
22 September, 1972
Tunnelling on the new Rome metro between Largo Colli Albani and Stazione Termini
22 September, 1972
A new approach to the dynamic breakage of rock
22 September, 1972
Inverted siphon under the river Avon at Bristol
22 September, 1972
Ventilation of road tunnels - BTS Discussion
22 September, 1972
International Mining Exhibition: Preview
22 July, 1972
Next stop San Francisco 1974
22 July, 1972
RETC Chicago June 1972 - Tunneling in practice
22 July, 1972
London Transport Report for 1971
22 July, 1972