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发明名称
Electromagnetic oscillating device with freely oscillating armature
摘要
申请公布号
GB383879(A)
申请公布日期
1932.11.24
申请号
GB19320012129
申请日期
1932.04.27
申请人
BRITISH GOLDRING PRODUCTS LIMITED
发明人
分类号
H04R11/00
主分类号
H04R11/00
代理机构
代理人
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