
H&G Hegmanns Ingenieurgesellschaft mbH

Zhongxing Construction Co. Ltd.

Guangzhou Metro Design & Research Institute Co., Ltd.Guangdong Sheng, China

Seiler AGSwitzerland

Guangxi Construction Engineering Group No. 2 ConstructionGuangxi Zhuangzu Zizhiqu, China

Thöni Industriebetriebe GmbHTirol, Austria

Chemtex (Shanghai) Chemical Engineering Co., Ltd.

China Triumph International Engineering Co., Ltd.

Torkret GmbH

Anhui Jieyuan Environmental Protection Technology Co. Ltd.

CTI Engineering Co., Ltd.Tokyo, Japan

Global Design Technology SA