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发明名称
Improvements in or relating to loose-leaf binders
摘要
申请公布号
GB513931(A)
申请公布日期
1939.10.25
申请号
GB19380021438
申请日期
1938.07.19
申请人
WILLIAM VENNARD
发明人
分类号
B42F13/04
主分类号
B42F13/04
代理机构
代理人
主权项
地址
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