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ES411333A3
|
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Procedure to build coated tunnels. (Machine-translation by Google Translate, not legally binding)
|
|
ES411108A3
|
|
Improvements in equipment for the perforation of tunnels. (Machine-translation by Google Translate, not legally binding)
|
|
GB1364054A
|
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Centring devices for locating instruments axially within tubular enclosures
|
|
DE2065198A1
|
|
TUEBBING FOR TUNNELING
|
|
US3640076A
|
|
Tunnels or tunnelling
|
|
GB1276618A
|
|
Improvements in tunnel boring equipment
|
|
DE2023208A1
|
|
Method for driving a lined underground passage or tunnel with an oval cross-section
|
|
GB1275268A
|
|
Improvements in tunnel linings
|
|
GB1139542A
|
|
Controlling ground working operations
|
|
GB944064A
|
|
Improvements in or relating to sewers and like ducts
|
|
GB947575A
|
|
Improvements in or relating to road surfacing and like material
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