Oriental Engineering Works Pvt. Ltd.
Yamunanagar
India

TTC - TECHNICAL TUNNELLING COMPONENTS LIMITED
Hinckley
Great Britain

TUNNELLING ACCESSORIES
St Leonards on Sea
Great Britain

BRITISH TUNNELLING SOCIETY
London
Great Britain

TECHNICAL TUNNELLING COMPONENTS (TTC)
Hinckley, Leicestershire
Great Britain

SIG (ITALIAN TUNNELLING SOCIETY) FOR WTC 2019 AIM GROUP
Milano
Italy

HERRENKNECHT TUNNELLING SYSTEMS
Schwanau-Allmannsweiser
Germany

TURKISH TUNNELLING SOCIETY
Istanbul
Turkey

TECHNICAL TUNNELLING COMPONENTS LTD
Hinckley
Great Britain

SMITH AND LONG TUNNELLING
Markham
Canada

BRITISH TUNNELLING SOCIETY
London
Great Britain

BRAZILIAN TUNNELLING COMMITTEE
Sao Paulo - SP
Brazil

AB TUNNELLING
Pavia
Italy

TECHNICAL TUNNELLING COMPONENTS
Hinkley
Great Britain

Thailand Underground & Tunnelling Group (TUTG)
Bangkok
Thailand

ITA-AITES - International Tunnelling and Underground Space Association
Lausanne
Switzerland

UNDERGROUND CONSTRUCTION incorporating THE INTERNATIONAL TUNNELLING EXHIBITION is not staged anymore
London
Great Britain

BTS - THE BRITISH TUNNELLING SOCIETY CONFERENCE AND EXHIBITION
London
Great Britain