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发明名称
Relay testing device
摘要
申请公布号
US2432092(A)
申请公布日期
1947.12.09
申请号
US19430500935
申请日期
1943.09.02
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
FERRELL ENOCH B.
分类号
H04Q1/20
主分类号
H04Q1/20
代理机构
代理人
主权项
地址
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