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发明名称
摘要
申请公布号
NL7208049(A)
申请公布日期
1972.12.28
申请号
NL19720008049
申请日期
1972.06.13
申请人
发明人
分类号
H04R1/38;(IPC1-7):H04R1/28
主分类号
H04R1/38
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