33 ms·
It’s a similar tech to the oxygen candles use in old emergency self rescue units in mines, and still carried aboard submarines. https://en.m.wikipedia.org/wiki
by scottie_m 9y ago
It’s a similar tech to the oxygen candles use in old emergency self rescue units in mines, and still carried aboard submarines.
https://en.m.wikipedia.org/wiki/Chemical_oxygen_generator https://en.m.wikipedia.org/wiki/Chemical_oxygen_generator