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发明名称
Improvements in navigational and the like computing devices
摘要
申请公布号
GB741389(A)
申请公布日期
1955.11.30
申请号
GB19530014999
申请日期
1953.05.29
申请人
CHAN SO;LIEH JOHN WANG
发明人
分类号
G06G1/12
主分类号
G06G1/12
代理机构
代理人
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