Topic                                                                              OpenClose.html
Flying wind power plant with air chambers, controlled by a closure and / or volume reduction mechanism

DE102014009819A1
Flugwindkraftwerk mit Luftkammern, gesteuert über einen Verschluss- und/oder Volumenre
  • Tobias Wagner
  • teasing image, won't enlarge here.  Tobia Wagner promotes groundgen
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