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发明名称
Improvements in change speed chain gearings for cycles
摘要
申请公布号
GB710133(A)
申请公布日期
1954.06.09
申请号
GB19510024035
申请日期
1951.10.15
申请人
LES BREVETS SOUHART S.A.
发明人
分类号
B62M9/134
主分类号
B62M9/134
代理机构
代理人
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