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发明名称
INDEX-SELECTOR DEVICES
摘要
申请公布号
GB1597133(A)
申请公布日期
1981.09.03
申请号
GB19770008687
申请日期
1977.03.02
申请人
LAUGHTON & SONS LTD
发明人
分类号
B42F17/34;(IPC1-7):B42F17/34
主分类号
B42F17/34
代理机构
代理人
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