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发明名称
IMPROVEMENTS IN OR RELATING TO RING BINDER MECHANISMS
摘要
申请公布号
GB9111645(D0)
申请公布日期
1991.07.24
申请号
GB19910011645
申请日期
1991.05.30
申请人
HODKIN, RICHARD K;EAGERS, NIGEL
发明人
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主分类号
代理机构
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