Is Torricellian vacuum a real vacuum?

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Tags

1. #barometer
2. #invented
3. #above
4. #mercury
5. #liquid
6. #surface
7. #closed
8. #measured
9. #atmosphere
10. #vacuum
11. #torricelli
12. #vessel
13. #pressure
14. #showed
15. #torricellian
16. #space