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发明名称
METHOD OF ADJUSTING THE FREQUENCY OF PIEZO ELECTRIC CRYSTALS
摘要
申请公布号
CA563328(A)
申请公布日期
1958.09.16
申请号
CAD563328
申请日期
申请人
CANADIAN MARCONI COMPANY
发明人
REGINALD C. RICHARDS
分类号
主分类号
代理机构
代理人
主权项
地址
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