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发明名称
Multiple speed composite gear for bicycle drives
摘要
申请公布号
US2561960(A)
申请公布日期
1951.07.24
申请号
US19490124861
申请日期
1949.11.01
申请人
ALFRED WEAVER
发明人
WEAVER ALFRED
分类号
B62M11/06
主分类号
B62M11/06
代理机构
代理人
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地址
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