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发明名称
Transformer construction
摘要
申请公布号
US1891456(A)
申请公布日期
1932.12.20
申请号
US19310583840
申请日期
1931.12.30
申请人
SMITH FRANKLIN S
发明人
SMITH FRANKLIN S.
分类号
H01F30/10
主分类号
H01F30/10
代理机构
代理人
主权项
地址
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