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File:Kolbenluftpumpe hg.jpg

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Description
English: Vacuum pump and bell jar for vacuum experiments, used in science education during the early 20th century, on display in the Schulhistorische Sammlung (School Historical Museum), Bremerhaven, Germany.
Date
Source own work, Schulhistorische Sammlung Bremerhaven
Author Hannes Grobe (talk)
w:en:Creative Commons
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25 August 2008

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current09:24, 25 August 2008Thumbnail for version as of 09:24, 25 August 20082,180 × 1,822 (714 KB)Hgrobe{{Information |Description=Air pump to demonstrate vacuum |Source=own work, Schulhistorische Sammlung Bremerhaven |Date=2008-08-25 |Author=~~~ |Permission=Attribution 2.5 |other_versions= }} {{cc-by-3.0}} Category:Physical_phenomena

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