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Thni Industriebetriebe GmbHTirol, Austria

CAMUS ENGINEERING & CONSTRUCTION, Inc.GY, KR

Seidensha Co. Ltd.Yamanashi-ken, Japan

Nittoc Construction Co., Ltd.Tokyo-to, Japan

Nishiki Co., Ltd.Aichi-ken, Japan

Forjados y Estructuras Ligeras Castilla y León SA

Forterra Pipe & Precast LLC

Rathscheck Schiefer & Dach-systeme KGRheinland-Pfalz, Germany

China Railway 22nd Bureau Group Co., Ltd.

friedrich GmbH

Suzhou Kelida Building & Decoration Co., Ltd.Jiangsu Sheng, China