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发明名称
摘要
申请公布号
JPS57163880(U)
申请公布日期
1982.10.15
申请号
JP19810049542U
申请日期
1981.04.08
申请人
发明人
分类号
H04R17/00;A61F11/00;H04R1/00;H04R25/00;(IPC1-7):H04R1/00
主分类号
H04R17/00
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