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发明名称
Electromagnet
摘要
申请公布号
US2493885(A)
申请公布日期
1950.01.10
申请号
US19460717050
申请日期
1946.12.18
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
LAST JAMES
分类号
H01F7/14
主分类号
H01F7/14
代理机构
代理人
主权项
地址
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