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经营范围
发明名称
Schallerzeuger
摘要
A piezoelectric sound generator having a diaphragm carrying the piezoelectric element and at least one resonant chamber spaced from said diaphragm with the wall of said chamber being coincident with a node circle on the diaphragm.
申请公布号
DE2148704(A1)
申请公布日期
1972.04.06
申请号
DE19712148704
申请日期
1971.09.29
申请人
NITTAN CO.LTD.
发明人
TAKAHASHI,NAOKI;MORI,HIROSHI;UEKI,HIROSHI
分类号
H04R7/16;H04R17/00
主分类号
H04R7/16
代理机构
代理人
主权项
地址
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