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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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1 jan 1970 ano - Ed Hammer made CFLs with mercury vapor, argon, and a flurescent coating called phosphor

Adicionado na linha do tempo:

2 out 2018
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0
426

Data:

1 jan 1970 ano
Agora
~ 55 years ago