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发明名称
Improvements in umbrellas
摘要
申请公布号
GB354103(A)
申请公布日期
1931.08.06
申请号
GB19300028415
申请日期
1930.09.23
申请人
WILLIAM DONALD HALL
发明人
分类号
A45B7/00
主分类号
A45B7/00
代理机构
代理人
主权项
地址
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