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现货ULTEGRA 105 R7000 R8000 6800 R9100飞轮 11速 252830T 32 3
杆端关节轴承球头鱼眼接头内螺纹SI568101214161820 22 252830T/K
同步带轮惰轮铝合金EVD21-18 20 22 24 252830-T5150 T5200 T5250
