What does IP 68 mean?

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Tags

1. #resistance
2. #times
3. #phone
4. #efforts
5. #moisture
6. #gadget
7. #levels
8. #protection
9. #ratings
10. #should
11. #trying
12. #stands
13. #submerge
14. #prove
15. #ingress
16. #rating
17. #define
18. #waterproof
19. #things