PORR BAU GMBH

STRABAG AG NUF

RENESCO AG

OBRAS SUBTERRANEAS NUF

KJERRINGSUNDET AS

MALMPOL SPOLKA Z.O.O.

GHELLA S.P.A NUF

ACCIONA CONSTRUCCION S.A. NUF

ACCIONA INFRAESTRUCTURAS AND GHELLA ANS

COPUNO SWEDEN AB NUF

GLOBAL TUNNELLING EXPERTS (DANMARK) APS

BYGGING-UDDEMANN AB

HERRENKNECHT AG

BOHUS BERGENTREPRENAD AB

SICHUAN ROAD AND BRIDGE (SRBG) DEUTSCHLAND GMBH

GESTUNNEL SLU NUF

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