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发明名称
PIEZOCERAMIC TRANSDUCER FOR TELEPHONE INSTRUMENTS
摘要
<p>To reduce costs and to simplify assembly operations in existing piezoelectric transducers, use a printed circuit terminal board in order to eliminate wires and solderings, central piece part and cover.</p>
申请公布号
WO1990014737(A1)
申请公布日期
1990.11.29
申请号
EP1990000784
申请日期
1990.05.15
申请人
发明人
分类号
主分类号
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