Why did they change the uneven bars in gymnastics?

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Tags

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2. #manufacturing
3. #result
4. #separate
5. #design
6. #could
7. #change
8. #began
9. #adjustable
10. #apparatus
11. #slightly
12. #tension
13. #cables
14. #floor
15. #1960s
16. #specific
17. #apart
18. #changed
19. #farther
20. #companies
21. #uneven
22. #early
23. #allow
24. #1970s