What is LEL and UEL?

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Tags

1. #combustion
2. #value
3. #contact
4. #between
5. #specific
6. #oxygen
7. #gases
8. #combustible
9. #limit
10. #itself
11. #below
12. #explained
13. #lower
14. #required
15. #concentration
16. #minimum
17. #spark
18. #explosive