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发明名称
PIEZO-ELECTRIC CRYSTALS
摘要
申请公布号
CA497732(A)
申请公布日期
1953.11.17
申请号
CAD497732
申请日期
申请人
CANADIAN MARCONI COMPANY
发明人
WILFRID S. MORTLEY
分类号
主分类号
代理机构
代理人
主权项
地址
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