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1 janv. 1913 - William D. Coolidge, an American physicist and engineer, improved tungsten filaments which lead to the development of the prototype of modern X-ray tubes.

Ajouté au bande de temps:

EPQ

ByIsmat Khan
19 janv. 2018

Date:

1 janv. 1913
Maintenaint
~ Il y a 111 ans
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