1. SATO KOGYO CO., LTD, Hokuriku Branch(1-1, Sakuragi-cho, Toyama-shi, Toyama 930-8515, Japan)
2. SUMITOMO METAL MINING SIPOREX CO., LTD, Engineering Department Mie Division(1117-11, Sekichoege, Kameyama-shi, Mie 519-1106, Japan)
3. MURORAN INSTITUTE OF TECHNOLOGY, Graduate School of Engineering, College of Design and Manufacturing Technology(27-1, Mizumoto-cho, Muroran-shi, Hokkaido 050-8585, Japan)