What can thermite not burn through?

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Tags

1. #started
2. #temperature
3. #generous
4. #requiring
5. #thermite
6. #ignite
7. #molten
8. #difficult
9. #reaction
10. #amounts
11. #degrees
12. #metal
13. #produces
14. #temperatures
15. #ignited
16. #typically
17. #along