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发明名称
DIAPHRAGM FOR LOUDSPEAKER
摘要
申请公布号
JPH03270497(A)
申请公布日期
1991.12.02
申请号
JP19900070269
申请日期
1990.03.20
申请人
YAMAHA CORP
发明人
ITO HIROAKI
分类号
H04R7/12;H04R7/02;H04R9/04;H04R31/00
主分类号
H04R7/12
代理机构
代理人
主权项
地址
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