
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