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发明名称
PIEZOELECTRIC COMPOSITE MATERIAL
摘要
申请公布号
JPH03148884(A)
申请公布日期
1991.06.25
申请号
JP19890288442
申请日期
1989.11.06
申请人
NGK SPARK PLUG CO LTD
发明人
OGURA KOJI
分类号
H04R17/00;H01L41/187
主分类号
H04R17/00
代理机构
代理人
主权项
地址
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