[ScienceNews]　（２０）シリーズ節電・省エネ 蓄電池の課題

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A 5-minute video from SCIENCE CHANNEL（JST）: “[ScienceNews]　（２０）シリーズ節電・省エネ 蓄電池の課題”.

Video by SCIENCE CHANNEL（JST）, played through YouTube's embedded player.