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经营范围
发明名称
Electric furnace
摘要
申请公布号
US1947793(A)
申请公布日期
1934.02.20
申请号
US19290400327
申请日期
1929.10.17
申请人
ACHESON GRAPHITE COMPANY
发明人
O'NEIL FRED E.;CALLAHAN JOSEPH F.
分类号
H05B3/64
主分类号
H05B3/64
代理机构
代理人
主权项
地址
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