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发明名称
Improvements in piezo-electric frequency-control devices
摘要
申请公布号
GB574398(A)
申请公布日期
1946.01.03
申请号
GB19430012986
申请日期
1943.08.11
申请人
THE GENERAL ELECTRIC COMPANY LIMITED;STANLEY KARL LEWER
发明人
分类号
H03H9/09
主分类号
H03H9/09
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