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Furthermore, there exists the opposite concept of replacing water with air deep in the sea: https://www.iee.fraunhofer.de/en/research_projects/search/2017/sten

by patall 5y ago

Furthermore, there exists the opposite concept of replacing water with air deep in the sea: https://www.iee.fraunhofer.de/en/research_projects/search/2017/stensea.html https://www.iee.fraunhofer.de/en/research_projects/search/20...