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发明名称
摘要
申请公布号
JPS574744(U)
申请公布日期
1982.01.11
申请号
JP19800079274U
申请日期
1980.06.09
申请人
发明人
分类号
H04R1/00;G01N29/00;G01N29/06;G01N29/28;G02B21/00;(IPC1-7):G01N29/00
主分类号
H04R1/00
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