Bicycle frame system with internal transmission embedded in five-way part of bicycle
The invention discloses a bicycle frame system with an internal transmission embedded in a five-way part of a bicycle. The bicycle frame system comprises a vertical pipe, a five-way part, a head pipe, a lower pipe, an upper pipe, a bottom fork and a vertical fork, and is characterized in that an ins...
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Format: | Patent |
Sprache: | chi ; eng |
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