Checkvalveclosed.png (6KB, MIME tüüp: image/png)
image/png
This is a file from the Wikimedia Commons. The description on its description page there is copied below.
original : http://de.wikipedia.org/wiki/Bild:Kugelrückschlagventil_geschlossen.png
The Picture has a public domain licence, so GNU 1.2 might be to restrictive. Feel free to use it in any way you want. — MovGP0 22:26, 4. Aug 2006 (CEST)
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