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发明名称
Electrical frequency responsive device
摘要
申请公布号
US2034019(A)
申请公布日期
1936.03.17
申请号
US19340734051
申请日期
1934.07.06
申请人
GEORGE BIRD WILLIAM
发明人
BIRD WILLIAM GEORGE
分类号
G01R23/02
主分类号
G01R23/02
代理机构
代理人
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