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发明名称
Means for determining electrical axes in crystals
摘要
申请公布号
US1817181(A)
申请公布日期
1931.08.04
申请号
US19270196389
申请日期
1927.06.03
申请人
RADIO CORPORATION OF AMERICA
发明人
EBERHARD HEINRICH
分类号
G01R29/22
主分类号
G01R29/22
代理机构
代理人
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