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省エネ大賞受賞技術開発の軌跡 (9)
第1章 もったいない無駄と必要な無駄
1.1 夜の停電
1.1.4 NHKで全国に放送紹介
Trajectory of Energy Conservation Grand Prize-winning Technology Development (9)
Chapter 1 Wasteful Waste and Necessary Waste
1.1 Power Outage at night
1.1.4 Nationwide broadcast introduction on NHK