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发明名称
Testing system
摘要
申请公布号
US2029030(A)
申请公布日期
1936.01.28
申请号
US19340741363
申请日期
1934.08.25
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
LOW FRANK K.
分类号
H04M3/26
主分类号
H04M3/26
代理机构
代理人
主权项
地址
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