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经营范围
发明名称
FREQUENCY RESPONSE TESTING APPARATUS
摘要
申请公布号
GB1579735(A)
申请公布日期
1980.11.26
申请号
GB19760011182
申请日期
1976.03.19
申请人
NATIONAL RESEARCH DEVELOPMENT CORP
发明人
分类号
H04R25/00;H04R29/00;(IPC1-7):G01R27/28
主分类号
H04R25/00
代理机构
代理人
主权项
地址
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