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发明名称
Transmission measuring system
摘要
申请公布号
US1871944(A)
申请公布日期
1932.08.16
申请号
US19320586647
申请日期
1932.01.14
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
BEST FRED H.
分类号
G01R27/32
主分类号
G01R27/32
代理机构
代理人
主权项
地址
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