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1 janv. 1912 - Argon and Nitrogen Bulb The efficiency and durability of the bulb is improved by Irving Langmuir with a tighter filament coil and argon and nitrogen inside
Ajouté au bande de temps:
Batteries and Lightbulbs
By
Jacqueline Xie
11 sept. 2018
0
0
431
Date:
1 janv. 1912
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~ Il y a 113 ans
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