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发明名称
Improvements in or relating to piezo-electric crystals
摘要
申请公布号
GB834333(A)
申请公布日期
1960.05.04
申请号
GB19570024586
申请日期
1957.08.02
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
RICHARDS REGINALD CHARLES
分类号
H03H3/04
主分类号
H03H3/04
代理机构
代理人
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