发明公开
EP2918489A4 ASYMMETRIC ELLIPTICAL CHAINRING CAPABLE OF FINE-ANGLE VARIATION, AND CRANKSET OF BICYCLE COMPRISING SAME 审中-公开
非对称椭圆KETTERING进行精细角度变化和SO FAHRRADTRETLAGER

ASYMMETRIC ELLIPTICAL CHAINRING CAPABLE OF FINE-ANGLE VARIATION, AND CRANKSET OF BICYCLE COMPRISING SAME
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