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发明名称
PIEZOCERAMIC MATERIAL
摘要
申请公布号
PL267919(A2)
申请公布日期
1988.07.21
申请号
PL19870267919
申请日期
1987.09.28
申请人
发明人
分类号
C04B;C04B35/49;(IPC1-7):C04B/
主分类号
C04B
代理机构
代理人
主权项
地址
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