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发明名称
Testing device
摘要
申请公布号
US1869884(A)
申请公布日期
1932.08.02
申请号
US19300466732
申请日期
1930.07.09
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
CURTIS AUSTEN M.
分类号
G01N3/06
主分类号
G01N3/06
代理机构
代理人
主权项
地址
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