NIPPON RIETEC CO., LTD.Tokyo, Japan
Hankuk Eng Development Co. Ltd.
National Mining UniversityUkraine
CAMUS ENGINEERING & CONSTRUCTION, Inc.GY, KR
FiberCore Europe BVZuid-Holland, The Netherlands
GEO (Denmark)
Kyowa Electronic Instruments Co., Ltd.
DoArm Engineering Co., Ltd.
Takahata Co. Ltd.
Simpson Strong-Tie Co., Inc.California, United States
Shimizu Corp.Tokyo-to, Japan
Chang Xin Ying Zao Co. Ltd.