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发明名称
Electrical measuring apparatus
摘要
申请公布号
US2710397(A)
申请公布日期
1955.06.07
申请号
US19500170159
申请日期
1950.06.24
申请人
FOSTER GEORGE E
发明人
FOSTER GEORGE E.
分类号
H04M3/36
主分类号
H04M3/36
代理机构
代理人
主权项
地址
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