URS Corp.California, United States
Topcon Positioning Systems, Inc.California, United States
STAMAG Stahl- und Maschinenbau AG
Ningxia Hui Autonomous Region Electric Power Design InstituteNingxia Huizi Zizhiqu, China
China Communications Construction Co. Ltd.
John Clark Ltd.Birmingham, United Kingdom
Chun Wo Construction & Engineering Co. Ltd.
EDAG GmbH & Co. KGaAHessen, Germany
CTI Engineering Co., Ltd.Tokyo, Japan
CSSC Science & Technology Co., Ltd.Shanghai, China
Matsumura-Gumi Corp.Tokyo-to, Japan
Implenia Spezialtiefbau GmbH