how made these complex objects in moi?

 From:  Lordfox
6865.1 
hello dear moi-users,

how would you made this complex 3D Objects?
like in this link:

http://www.fit-production.de/img/teaser/additivessereinfertigung.jpg

I mean especially case number: #1 and #2 .... #5 and #6 .... and the last three examples ;)

best wishes