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发明名称
Line insulation testing circuit
摘要
申请公布号
US2755345(A)
申请公布日期
1956.07.17
申请号
US19530359318
申请日期
1953.06.03
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
VAUPEL ERNEST WALTER
分类号
H04M3/30
主分类号
H04M3/30
代理机构
代理人
主权项
地址
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