http://twitter.com/DailyRantOnWeb/status/839025626577268736 German institute successfully tests underwater energy storage sphere https://t.co/8dsqtTAm3H Fraunhofer IWES | Energy system technology …German institute successfully tests underwater energy storage sphere https://t.co/8dsqtTAm3H
— Daily Rant Online (@DailyRantOnWeb) March 7, 2017
Fraunhofer IWES | Energy system technology
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