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发明名称
Device for electrical frequency and speed measuring
摘要
申请公布号
US2740092(A)
申请公布日期
1956.03.27
申请号
US19520274483
申请日期
1952.03.01
申请人
FRIEDRICH LICHTENBERGER
发明人
LICHTENBERGER FRIEDRICH
分类号
G01P3/22;G01P3/495
主分类号
G01P3/22
代理机构
代理人
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地址
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