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发明名称
HILFSEINRICHTUNG FUER FERNSPRECHGERAETE.
摘要
申请公布号
DE1655290(U)
申请公布日期
1953.05.07
申请号
DE195200M9333U
申请日期
1952.11.25
申请人
HERMANN METZGER
发明人
HERMANN METZGER
分类号
主分类号
代理机构
代理人
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地址
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