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发明名称
Perfectionnements aux changements de vitesse pour cycles, par déraillage de la chaîne
摘要
申请公布号
FR1017449(A)
申请公布日期
1952.12.10
申请号
FRD1017449
申请日期
1950.05.12
申请人
发明人
GAUTHEROT CHARLES
分类号
B62M9/126
主分类号
B62M9/126
代理机构
代理人
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