
Seismic Structural Design Associates, Inc.

Nissui Engineering Co., Ltd.

Tanabe Engineering Corp.

Howmet Aerospace, Inc.Pennsylvania, United States

Freyssinet Korea Co., Ltd.

Guangzhou Yuexin Engineering Technology Co. Ltd.

Concast, Inc.Minnesota, United States

Focused Photonics (Hangzhou), Inc.Zhejiang, China

Shanghai Tunnel Engineering Co., Ltd.Shanghai, China

friedrich GmbH

Byucksan Engineering Co. Ltd.Kyonggi-do, South Korea

Elektrowerkzeuge Abwicklungs GmbH & Co. KG