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发明名称
PREPAYMENT SYSTEM
摘要
申请公布号
GB8401932(D0)
申请公布日期
1984.02.29
申请号
GB19840001932
申请日期
1984.01.25
申请人
SCHLUMBERGER ELECTRONICS (UK) LTD
发明人
分类号
G07F7/00;G07F7/08;G07F15/00;(IPC1-7):G07F7/00
主分类号
G07F7/00
代理机构
代理人
主权项
地址
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