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发明名称
Testing apparatus
摘要
申请公布号
US2249323(A)
申请公布日期
1941.07.15
申请号
US19370158504
申请日期
1937.08.11
申请人
BELL TELEPHONE LABORATORIES INCORPORATED
发明人
MITCHELL DOREN
分类号
H04B3/06;H04B3/46
主分类号
H04B3/06
代理机构
代理人
主权项
地址
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