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发明名称
Improvements in or relating to holders for piezo electric crystal elements
摘要
申请公布号
GB509779(A)
申请公布日期
1939.07.20
申请号
GB19380001940
申请日期
1938.01.20
申请人
MARCONI'S WIRELESS TELEGRAPH COMPANY LIMITED;DENYS HILARY COOKE SCHOLES;DONALD FAIRWEATHER
发明人
分类号
H03H9/09
主分类号
H03H9/09
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