產品背隙：P2：標準背隙 P1：精密背隙
1段速比：3-10 2段速比：12-70 3段速比：80-1000
| Model (框型) | 60, 90, 120 |
|---|---|
| 段數 | 單段, 雙段 |
Only logged in customers who have purchased this product may leave a review.
產品背隙：P2：標準背隙 P1：精密背隙
1段速比：3-10 2段速比：12-70 3段速比：80-1000
| Model (框型) | 60, 90, 120 |
|---|---|
| 段數 | 單段, 雙段 |
Only logged in customers who have purchased this product may leave a review.
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