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20 Jul 1928 Jahr - Freon was invented

Beschreibung:

The compound freon was invented as a better alternatives to the other chemicals being used in fridges like sulfur dioxide and amonia as it was much lower toxicity.

Zugefügt zum Band der Zeit:

Science heat project

ByRobert Davidson
24 Jan 2018

Datum:

20 Jul 1928 Jahr
Jetzt
~ 95 years ago
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