About MUTOH T
About Onahama Smelting & Refining Co., Ltd, Fukushima, JPN
About KONISHI J
About Onahama Smelting & Refining Co., Ltd, Fukushima, JPN
About HAYASHI S
About Onahama Smelting & Refining Co., Ltd, Fukushima, JPN
About EPD Congress 1990
About copper refining
About Refining
About 銅精錬
About スライム
About テルル
About 銅