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发明名称
SPEAKER
摘要
申请公布号
JPS5414730(A)
申请公布日期
1979.02.03
申请号
JP19770079853
申请日期
1977.07.06
申请人
HITACHI LTD
发明人
IRIKOU TAKAHIKO;KAWAMURA SHINICHIROU
分类号
H04R7/02;H04R7/12
主分类号
H04R7/02
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代理人
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