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发明名称
Automatic fidelity control
摘要
申请公布号
US2234514(A)
申请公布日期
1941.03.11
申请号
US19380247025
申请日期
1938.12.21
申请人
BARBER ALFRED W
发明人
BARBER ALFRED W.
分类号
主分类号
代理机构
代理人
主权项
地址
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