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发明名称
Piezoelectric crystal holder
摘要
申请公布号
US2137304(A)
申请公布日期
1938.11.22
申请号
US19360086026
申请日期
1936.06.19
申请人
RADIO CORPORATION OF AMERICA
发明人
PARKIN THOMAS DIXON
分类号
H03H9/05
主分类号
H03H9/05
代理机构
代理人
主权项
地址
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