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发明名称
Testing apparatus
摘要
申请公布号
US1938684(A)
申请公布日期
1933.12.12
申请号
US19310565059
申请日期
1931.09.25
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BOND DONALD S.;FULLER CALVIN S.;ERICKSON CHARLES L.
分类号
G01R31/02
主分类号
G01R31/02
代理机构
代理人
主权项
地址
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