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发明名称
Mounting arrangement for plated piezoelectric crystals
摘要
申请公布号
US2597757(A)
申请公布日期
1952.05.20
申请号
US19480013223
申请日期
1948.03.05
申请人
AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED
发明人
SPEARS RALPH AUBREY
分类号
H03H9/09
主分类号
H03H9/09
代理机构
代理人
主权项
地址
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