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发明名称
Crank bearing for bicycles
摘要
申请公布号
US2257401(A)
申请公布日期
1941.09.30
申请号
US19390287897
申请日期
1939.08.02
申请人
SCHWINN FRANK W
发明人
SCHWINN FRANK W.
分类号
B62K19/34
主分类号
B62K19/34
代理机构
代理人
主权项
地址
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