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发明名称
IMPROVEMENTS IN OR RELATING TO A DOCUMENT-HOLDER
摘要
申请公布号
GB9020407(D0)
申请公布日期
1990.10.31
申请号
GB19900020407
申请日期
1990.09.19
申请人
OFREX GROUP HOLDINGS PLC
发明人
分类号
B42F7/02
主分类号
B42F7/02
代理机构
代理人
主权项
地址
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