30
/ru/
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
June 15, 2024
1789401
145182
2
Public Timelines FAQ
Public TimelinesFAQ
Public TimelinesFAQ
For educational institutions For teachers For students Open cabinet
For educational institutions For teachers For students Open cabinet
Создать
Create a timeline
Public timelines
Library
FAQ

1 янв 1970 г. - Ed Hammer made CFLs with mercury vapor, argon, and a flurescent coating called phosphor

Добавлено на ленту времени:

Light bulb Timeline

BySara
2 окт 2018
0
0
293

Дата:

1 янв 1970 г.
Сейчас
~ 54 г назад
About & FeedbackСоглашениеПриватностьБиблиотека
2024 © Time.Graphics
Support 24/7  
CabinetGet premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL
Excellent (Trustpilot Reviews)
Based on 115+ reviews