1 jan 1936 ano - The Beckman pH meter
is released
Descrição:
The meter was produced in order to find a better way to measure the pH of solutions. Beckman fit all of the needed instrumentation in a nice small box.
https://www.acs.org/content/acs/en/education/whatischemistry/landmarks/beckman.html
Adicionado na linha do tempo:
CH 345 Timeline
Data:
Imagens:
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