Concept of spool vacuum air pump, essentially a pump pushing air formed by a piston and a cylinder invented by Otto von Guericke in 17th century Stock Photo - Alamy
Flüssgkeitsringvakuumpumpen | Star Pump Alliance - SPA
die erste Vakuumpumpe
Vakuumexperiment -Fotos und -Bildmaterial in hoher Auflösung – Alamy
Otto-von-Guericke-Gesellschaft: Neue Magdeburger Experimente
Otto-von-Guericke-Gesellschaft: Neue Magdeburger Experimente