About KANNO TOSHITAKE
About 木村鋳造所
About casting(metal)
About cast iron
About scrap iron
About surface treated steel sheet
About high strength steel
About impurity
About removal
About fluctuation and variation
About price change
About iron scrap
About Casting in general
About Recycling of resources
About 鋳造
About 要素技術
About 鋳鉄
About スチール
About スクラップ
About 不純物
About 元素