File:Vacuum Tube for Beckman pH Meter 2006.519.jpg
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![File:Vacuum Tube for Beckman pH Meter 2006.519.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/3/30/Vacuum_Tube_for_Beckman_pH_Meter_2006.519.jpg/343px-Vacuum_Tube_for_Beckman_pH_Meter_2006.519.jpg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:36, 3 April 2014 | ![]() | 429 × 750 (48 KB) | commons>Mary Mark Ockerbloom | {{Photograph |photographer =Staff photographer |title = |description =Vacuum tube for Beckman pH Meter |depicted people = |depicted place = |date =2006 |medium = |dimensions =... |
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