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经营范围
发明名称
Acoustic impedance matching
摘要
申请公布号
US3383631(A)
申请公布日期
1968.05.14
申请号
US19650490160
申请日期
1965.09.16
申请人
ZENITH RADIO CORPORATION
发明人
KORPEL ADRIANUS
分类号
G10K11/02
主分类号
G10K11/02
代理机构
代理人
主权项
地址
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