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发明名称
摘要
申请公布号
NL6918190(A)
申请公布日期
1970.06.08
申请号
NL19690018190
申请日期
1969.12.03
申请人
发明人
分类号
H04R23/00;(IPC1-7):H01L9/00;G01L1/18
主分类号
H04R23/00
代理机构
代理人
主权项
地址
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