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发明名称
Improvements relating to loose-leaf books
摘要
申请公布号
GB333608(A)
申请公布日期
1930.08.18
申请号
GB19290015299
申请日期
1929.05.16
申请人
WILLIAM GIBSON THOMLINSON
发明人
分类号
B42F3/00
主分类号
B42F3/00
代理机构
代理人
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