User:Ellmer

Wilfried Ellmer, Floating shell structures, submarine habitats, concrete shell seasteading, European Submarine Structures AB

[1]

Floating and submersible concrete shell structures.

http://imulead.com/tolimared/concretesubmarine/marine/image/lens.jpg

Submarine Habitats.

http://imulead.com/tolimared/concretesubmarine/image/aaa-submarine.jpg