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发明名称
Electrical recording
摘要
申请公布号
US1961372(A)
申请公布日期
1934.06.05
申请号
US19280321691
申请日期
1928.11.24
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
MARRISON WARREN A.
分类号
G01R13/06
主分类号
G01R13/06
代理机构
代理人
主权项
地址
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