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发明名称
PROGRAMMABLE ELECTRONIC CALCULATOR
摘要
申请公布号
GB1495840(A)
申请公布日期
1977.12.21
申请号
GB19750021868
申请日期
1975.05.21
申请人
IBM CORP
发明人
分类号
G06F3/023;G06F3/147;G06F15/02;H01H13/84;(IPC1-7):G06F3/02
主分类号
G06F3/023
代理机构
代理人
主权项
地址
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