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发明名称
摘要
申请公布号
JPH0324792(U)
申请公布日期
1991.03.14
申请号
JP19890085248U
申请日期
1989.07.20
申请人
发明人
分类号
C04B28/02;H04R1/02;(IPC1-7):H04R1/02;C04B22:06
主分类号
C04B28/02
代理机构
代理人
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地址
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