About MIYAKOSHI YASUKI
About SAKAI MASAHIRO
About KAMOTA SHUICHI
About SHIBATA ISAO
About 北海道住電精密
About MARUYAMA MASAO
About 北海道住電精密
About KANAYAMA TATSUYA
About 北海道住電精密
About 北海道立工業試験場報告
About cemented carbide
About YK30
About Powder compacting,sintering
About 硬合金
About 鋼
About 複合化
About 研究