About MARUYAMA KAICHIRO
About 住友金属工業
About BESSHO KIYOSHI
About 住金溶接工業
About ARIMOCHI KAZUSHIGE
About 住友金属工業 総技研
About ONISHI KAZUSHI
About 住友金属工業 鹿島製鉄所
About IIYAMA HIDEAKI
About 栗本鉄工所
About MURAYAMA HIROSHI
About 栗本鉄工所
About thick plate
About HT980
About Iron and steel materials
About 厚
About 厚鋼板
About 開発