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发明名称
Perfectionnements apportés aux dispositifs de changement de vitesse pour cycles
摘要
申请公布号
FR873720(A)
申请公布日期
1942.07.17
申请号
FRD873720
申请日期
1941.07.09
申请人
发明人
GAUTHEROT CHARLES
分类号
B62M9/124
主分类号
B62M9/124
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代理人
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