About RACHI HIDEKI
About 東京電力
About 電気学会論文誌 B
About electric power storage
About sodium-sulfur battery
About practical application
About technological innovation
About load regulation
About voltage drop
About voltage sag
About Secondary batteries
About 電力技術
About イノベーション
About 電力貯蔵
About NAS電池
About 開発
About 実用化