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经营范围
发明名称
REDUCING NOISE BY CANCELLATION
摘要
申请公布号
GB8505478(D0)
申请公布日期
1985.04.03
申请号
GB19850005478
申请日期
1985.03.04
申请人
NATIONAL RESEARCH DEVELOPMENT CORPORATION
发明人
分类号
G10K11/175
主分类号
G10K11/175
代理机构
代理人
主权项
地址
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