How to do that???

[Krzyk]

Hey,
can anyone tell me how can I do something like that?

http://www.leroymerlin.pl/files/media/image/761/1586761/product/lampa-wiszaca-abros,main.jpg

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[pilou]

Draw concentric lines (there is a plugin by Tig for that)
radial line and radial line Fixed length
Then a little plugin by Didier Bur (Lines2tubes)
Use Component if you want put some thickness

[ely862me]

I would search for one of Taffgoch geospheres and replace the components with tubes.
As I did here.

I have first drawn a line from the center of the components to the guide point he placed in each of them, then I have drawn a tube on that line, then I scaled down the inside part of the tube .
Scaling down the inside of the tube is optional, if you want you can make them shorter and smaller in diameter.

[d12dozr]

Brilliant solution, Ely