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发明名称
Trigonometrical calculating device
摘要
申请公布号
US2300347(A)
申请公布日期
1942.10.27
申请号
US19410424821
申请日期
1941.12.29
申请人
DALTON JOHN T
发明人
DALTON JOHN T.
分类号
G06G3/06
主分类号
G06G3/06
代理机构
代理人
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