6 ms·
I think that property of a vacuum is already used in a day-to-day object. https://en.wikipedia.org/wiki/Vacuum_flask https://en.wikipedia.org/wiki/Vacuum_flask
by Syssiphus 7y ago
I think that property of a vacuum is already used in a day-to-day object.
https://en.wikipedia.org/wiki/Vacuum_flask https://en.wikipedia.org/wiki/Vacuum_flask