What do the four Led Zeppelin symbols mean?

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Tags

1. #choose
2. #symbols
3. #personal
4. #robert
5. #inside
6. #sleeve
7. #jimmy
8. #emblem
9. #label
10. #represent
11. #member
12. #cover
13. #plant
14. #right
15. #bonham
16. #jones
17. #zeppelin