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发明名称
SMOOTHING DEVICE
摘要
申请公布号
CA330961(A)
申请公布日期
1933.03.14
申请号
CAD330961
申请日期
申请人
THE RADIO CORPORATION OF AMERICA
发明人
JOHAN WILLEM ALEXANDER;EKKO OOSTERHUIS
分类号
主分类号
代理机构
代理人
主权项
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