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发明名称
Piezoelectric crystal apparatus
摘要
申请公布号
GB548517(A)
申请公布日期
1942.10.13
申请号
GB19410011368
申请日期
1941.09.05
申请人
发明人
分类号
H03H9/09;H03H9/13;H03H9/135;H03H9/19
主分类号
H03H9/09
代理机构
代理人
主权项
地址
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