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经营范围
发明名称
Electric furnace
摘要
申请公布号
US1805469(A)
申请公布日期
1931.05.19
申请号
US19270209111
申请日期
1927.07.28
申请人
RENE DUFOUR
发明人
DUFOUR RENE
分类号
H05B6/22
主分类号
H05B6/22
代理机构
代理人
主权项
地址
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