Topic  "Cluster aerofoil system for wind energy utilization" (translated)   or:   "Tethered wing system for wind energy use" EnerKite  Same: CN104838133B   US10053216B2    Alexander Bormann , Berlin ( DE ) ; Stefan Skutnik , Bernau ( DE ) ; Christian Gebhardt , Berlin ( DE ) ; Maximilian Ranneberg , Berlin ( DE )  reverse Yo-Yo concept enerkite.de/downloads/EK_Broschure_EN.pdf

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