TARKON PROJEKT SP. Z.O.O.

BROTEKNIK I NORR AB

2P SOLUTION SPOLKA Z OGRANICZONA ODPOWIEDZIALNOSCIA NUF

AURSTAD TUNNEL AS

SPIE NEDERLAND B.V.

S H BERGTEKNIK

W. GIERTSEN AS

MARTI IAV SOLBAKK DA

AURSTAD AS

PNC NORGE AS

SICHUAN ROAD & BRIDGE (GROUP) CORPORATION LTD.

JOINT VENTURE SRBG-VNG ANS

PORR BAU GMBH

STRABAG AG

RENESCO AG

OBRAS SUBTERRANEAS

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