About YAJIMA YOICHI
About 長野県工試
About NAKATA TAKASHI
About アキタ理研
About 長野県工業試験場研究報告
About environmental conservation
About sewage sludge
About Manufacturing of ceramics and ceramic whiteware
About Recycling of resources
About 下水処理
About 焼却
About 汚泥
About 灰
About 配合
About セラミックス
About 開発