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发明名称
Improvements relating to acoustic delay-lines
摘要
申请公布号
GB667218(A)
申请公布日期
1952.02.27
申请号
GB19490023442
申请日期
1949.09.10
申请人
FERRANTI LIMITED;FRANCIS DUERDEN
发明人
分类号
H03H9/02;H03H9/30
主分类号
H03H9/02
代理机构
代理人
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地址
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