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'''[[Main Page|Home]] * [[Search]] * [[Node]] * Nodes per Second'''
[[FILE:RotationsPerMinZollern.JPG|border|right|thumb| [https://en.wikipedia.org/wiki/Tachometer RPM gauge] <ref>[https://en.wikipedia.org/wiki/Tachometer RPM gauge] of an [https://commons.wikimedia.org/wiki/File:Zeche_Zollern_Kompressormotor.jpg?uselang=en electric driven air compressor] in the [https://commons.wikimedia.org/wiki/File:Zeche_Zollern_Dortmund_-_Maschinenhalle.jpg?uselang=en machine hall] of [[:Category:Zollern|Zollern II/IV Colliery]], [https://en.wikipedia.org/wiki/Dortmund Dortmund] [https://de.wikipedia.org/wiki/B%C3%B6vinghausen_(Dortmund) Bövinghausen], Germany - part of [[:Category:Industrial Heritag Heritage Trail|The Industrial Heritage Trail]], Image by [[Gerd Isenberg]], September 18, 2016</ref> ]]
'''Nodes per Second''', (NPS)<br/>
'''[[Node|Up one Level]]'''
[[Category:Industrial Heritag Heritage Trail]]
[[Category:Zollern]]
