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发明名称
Tonfilmgeraet
摘要
申请公布号
DE841401(C)
申请公布日期
1952.06.16
申请号
DE1950S020705
申请日期
1950.10.29
申请人
MANFRED SEIFFERT
发明人
MANFRED SEIFFERT
分类号
G03B31/04
主分类号
G03B31/04
代理机构
代理人
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