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经营范围
发明名称
Blast furnace bell
摘要
申请公布号
US2215879(A)
申请公布日期
1940.09.24
申请号
US19380227297
申请日期
1938.08.29
申请人
JOHNSON HJALMAR W
发明人
JOHNSON HJALMAR W.
分类号
C21B7/18
主分类号
C21B7/18
代理机构
代理人
主权项
地址
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