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发明名称
System of amplification of alternating current
摘要
申请公布号
US2029316(A)
申请公布日期
1936.02.04
申请号
US19310552247
申请日期
1931.07.21
申请人
GEBHARD LOUIS A
发明人
GEBHARD LOUIS A.
分类号
H03B5/34
主分类号
H03B5/34
代理机构
代理人
主权项
地址
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