What is liquid nitrogen used for?

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Tags

1. #scientists
2. #liquid
3. #study
4. #variety
5. #nitrogen
6. #which
7. #boiling
8. #temperatures
9. #cancerous
10. #effect
11. #materials
12. #things
13. #cells
14. #warts
15. #where
16. #medicine
17. #cryogenics
18. #unwanted
19. #remove
20. #coolant
21. #computers
22. #point