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发明名称
Audio level indicator
摘要
申请公布号
US2575358(A)
申请公布日期
1951.11.20
申请号
US19460689352
申请日期
1946.08.09
申请人
NUCKOLLS RICHARD G
发明人
NUCKOLLS RICHARD G.
分类号
G01R1/30
主分类号
G01R1/30
代理机构
代理人
主权项
地址
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