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经营范围
发明名称
Variable attenuator
摘要
申请公布号
US2630491(A)
申请公布日期
1953.03.03
申请号
US19460652520
申请日期
1946.03.07
申请人
WALTZ MAYNARD C
发明人
WALTZ MAYNARD C.
分类号
H03H7/24
主分类号
H03H7/24
代理机构
代理人
主权项
地址
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