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发明名称
SOUND RECORDING MECHANISM
摘要
申请公布号
CA383734(A)
申请公布日期
1939.08.29
申请号
CAD383734
申请日期
申请人
TEFI-APPARATEBAU DR. DANIEL K.-G.
发明人
GUSTAV FRIES
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主分类号
代理机构
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