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发明名称
GEHAEUSE FUER ELEKTROAKUSTISCHE SCHALLABSTRAHLUNG.
摘要
申请公布号
DE1696492(U)
申请公布日期
1955.04.14
申请号
DE195500B0712U
申请日期
1955.01.26
申请人
WALTER BECKER
发明人
WALTER BECKER
分类号
主分类号
代理机构
代理人
主权项
地址
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