Keywords: Pressure and expansion springs.PNG Pressure and expansion springs Where did this image come from Stef Breukel donated it to wikipedia 2007-04-16 Who created this image Stef Breukel <br><br>Who owns the copyright to this image Stef Breukel did Released into the public domain by the author en wikipedia Stef breukel Original upload log page en wikipedia Pressure_and_expansion_springs PNG 2007-04-16 10 44 Stef breukel 475×459× 11010 bytes <nowiki><ref></ref>Who created this image Stef Breukel Who owns the copyright to this image Stef Breukel Where did this image come from Stef Breukel donated it to wikipedia </nowiki> 2007-04-16 10 29 Stef breukel 476×496× 11997 bytes <nowiki>Who created this image Stef Breukel Who owns the copyright to this image Stef Breukel Where did this image come from Stef Breukel donated it to wikipedia </nowiki> Balanced-arm lamps |