| 摘要 |
Handebars 50 contains one or more swivels 10. Swivel 10 are typically mounted between handelbar segments 11 and 12, and between segments 13 and 11 . Each swivel 10 comprises an inner tube 23, spring loaded buttons 28, adapter tube 31 and outer tube 25. Inner tube 23 is free to rotate within outer tube 25 only when buttons 28 are depressed.
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