
GS Engineering & Construction Corp.

Dynomax Drilling Tools, Inc.Alberta, Canada

Macotec Srl

FRIMATEC Ingenieurgesellschaft mbH

Burns & McDonnell Engineering Co., Inc.Missouri, United States

Delta Technology Corp.

China Energy Engineering Group Guangdong Power Engineering Co.

Fast-Form Systems Ltd.United Kingdom

Cordek Ltd.West Sussex, United Kingdom

IHI Infrastructure Systems Co., Ltd.

Clarkson Industrial Contractors, Inc.South Carolina, United States

Dagang Holding Group Co., Ltd.Shaanxi Sheng, China