
Costain Oil, Gas & Process Ltd.

Welle Environmental Group Co., Ltd.Jiangsu Sheng, China

Zhejiang Tuna Environmental Science & Technology Co., Ltd.Zhejiang, China

CTI Engineering Co., Ltd.Tokyo, Japan

Calder Ltd.

Guangxi Liugong Machinery Co., Ltd.Guangxi Zhuangzu Zizhiqu, China

China State Construction Engineering Corp. Ltd.Dubai, United Arab Emirates

Hongrun Construction Group Co., Ltd.Shanghai, China

aixACCT Systems GmbHNordrhein-Westfalen, Germany

Advanced Surveying & Mapping, Inc.Illinois, United States

Tele Rilevamento Europa - T.R.E. SRL

Third Construction Engineering Co., Ltd. of China Const