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发明名称
MICROPHONES
摘要
申请公布号
GB8914228(D0)
申请公布日期
1989.08.09
申请号
GB19890014228
申请日期
1989.06.21
申请人
GENERAL ELECTRIC COMPANY PLC, THE
发明人
分类号
主分类号
代理机构
代理人
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