
Halla Cement Corp.Kangwon-do, South Korea

Hebel AG

Fujian Huidong Construction Engineering Co. Ltd.

Zibo Jiafeng Mining Co. Ltd.

G. Engineering SrlToscana, Italy

Beifang Blasting Technology Co. Ltd.

Wakachiku Construction Co., Ltd.Hokkaido, Japan

Nichiei Co. Ltd.

Built Robotics, Inc.California, United States

Envirotech Engineering & Consulting, Inc.Oklahoma, United States

Korea Institute of Construction TechnologyGyeonggi-do, South Korea

China Railway Erju 4th Engineering Co. Ltd.