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发明名称
Improvements in and relating to piezo-electric devices
摘要
申请公布号
GB765835(A)
申请公布日期
1957.01.16
申请号
GB19510023965
申请日期
1951.10.15
申请人
COSMOCORD LIMITED;ROBERT HEINRICH STURM
发明人
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主分类号
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代理人
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