| 摘要 |
A tensioner comprising a base, a pivot arm pivotally engaged with the base, a torsion spring engaged between the base and the pivot arm for biasing the pivot arm, a first damping member and a second damping member disposed between the pivot arm and the base, the first damping member wedgingly engagable between the pivot arm and the second damping member, and the second damping member frictionally engaged between the first damping member and the base.
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