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发明名称
Method of making a focused multicell
摘要
申请公布号
US2731713(A)
申请公布日期
1956.01.24
申请号
US19510257694
申请日期
1951.11.23
申请人
GENERAL ELECTRIC COMPANY
发明人
SCHAEFER VINCENT J.
分类号
B21D53/04;H05B3/00
主分类号
B21D53/04
代理机构
代理人
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