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发明名称
摘要
申请公布号
JPS5233322(U)
申请公布日期
1977.03.09
申请号
JP19750119558U
申请日期
1975.08.29
申请人
发明人
分类号
H04R1/02;B32B1/06;C04B33/00;(IPC1-7):H04R1/02
主分类号
H04R1/02
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代理人
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