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发明名称
Improvements in or relating to piezo-electric crystal holders
摘要
申请公布号
GB498340(A)
申请公布日期
1939.01.06
申请号
GB19370025393
申请日期
1937.09.18
申请人
MARCONI'S WIRELESS TELEGRAPH COMPANY, LIMITED
发明人
分类号
H03H9/09
主分类号
H03H9/09
代理机构
代理人
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地址
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