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发明名称
Indicating system for books
摘要
申请公布号
GB855072(A)
申请公布日期
1960.11.30
申请号
GB19560037784
申请日期
1956.12.11
申请人
YOSHIO AKAO
发明人
分类号
B42F21/00
主分类号
B42F21/00
代理机构
代理人
主权项
地址
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