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经营范围
发明名称
Improved hearing aids
摘要
申请公布号
GB2004439(A)
申请公布日期
1979.03.28
申请号
GB19780039494
申请日期
1978.10.05
申请人
MACRAE R
发明人
分类号
G02C11/06;(IPC1-7):G02C11/06
主分类号
G02C11/06
代理机构
代理人
主权项
地址
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