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A circular slide rule. Photo by User:Janke, released to
Public domainPublic domainfalsefalse
This work has been released into the public domain by its author, Janke at English Wikipedia. This applies worldwide. In some countries this may not be legally possible; if so: Janke grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.Public domainPublic domainfalsefalse
La bildo estas kopiita de wikipedia:en. La originala priskribo estas: A circular slide rule. Photo by User:Janke, released to {{PD-self}} {| border="1" ! date/time || username || edit summary |---- | 13:04, 28 September 2005 || en:User:Janke ||