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发明名称
Perfectionnements aux changements de vitesse à friction
摘要
申请公布号
FR699633(A)
申请公布日期
1931.02.18
申请号
FRD699633
申请日期
1930.07.25
申请人
发明人
ROBERTSON JOHN HOGG
分类号
F16H61/662
主分类号
F16H61/662
代理机构
代理人
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