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1 gen 1913 anni - William D. Coolidge, an American physicist and engineer, improved tungsten filaments which lead to the development of the prototype of modern X-ray tubes.
Aggiunto al nastro di tempo:
EPQ
By
Ismat Khan
19 gen 2018
0
0
352
Data:
1 gen 1913 anni
Adesso
~ 111 years ago
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