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经营范围
发明名称
SYSTEM FOR MEASURING DISPLACEMENT AMPLITUDE OF OSCILLATING SURFACES IN ELECTROMECHANICAL ACOUSIC TRANSDUCERS
摘要
申请公布号
PL160836(B1)
申请公布日期
1993.04.30
申请号
PL19890281034
申请日期
1989.08.10
申请人
发明人
分类号
G01H1/08;G01H5/00;G01M7/02;H04R29/00;(IPC1-7):G01H1/08
主分类号
G01H1/08
代理机构
代理人
主权项
地址
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