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发明名称
Improvements in change-speed gears for bicycles
摘要
申请公布号
GB786605(A)
申请公布日期
1957.11.20
申请号
GB19560001728
申请日期
1956.01.18
申请人
OSCAR LUX
发明人
分类号
B62M11/14;B62M25/00
主分类号
B62M11/14
代理机构
代理人
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