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发明名称
Apparat til omdannelse af elektrisk energi til akustisk energi og omvendt.
摘要
申请公布号
DK82765(C)
申请公布日期
1957.04.29
申请号
DK19520001432
申请日期
1952.05.03
申请人
ELEKTRISKA AKTIEBOLAGET AEG
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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