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发明名称
AN ACOUSTIC CALIBRATION DEVICE
摘要
申请公布号
GB2181022(B)
申请公布日期
1989.05.10
申请号
GB19860019628
申请日期
1986.08.12
申请人
* BRUEEL & KJAER AS
发明人
ERLING * FREDERIKSEN
分类号
G01H17/00;G01H3/00;G01H3/10;H04R29/00;(IPC1-7):H04R29/00
主分类号
G01H17/00
代理机构
代理人
主权项
地址
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