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发明名称
Device for measuring displacements with carrier frequency
摘要
申请公布号
US2297251(A)
申请公布日期
1942.09.29
申请号
US19380214130
申请日期
1938.06.16
申请人
KARL SCHILD
发明人
SCHILD KARL
分类号
G01B7/02
主分类号
G01B7/02
代理机构
代理人
主权项
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