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发明名称
Improved calculating device
摘要
申请公布号
GB819920(A)
申请公布日期
1959.09.09
申请号
GB19560015397
申请日期
1956.05.17
申请人
ALBERT ERNEST GOODSON
发明人
分类号
A63F1/18;B43K29/093
主分类号
A63F1/18
代理机构
代理人
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地址
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