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发明名称
Heat treatment of steel rails and shapes
摘要
申请公布号
US1882115(A)
申请公布日期
1932.10.11
申请号
US19310545150
申请日期
1931.06.17
申请人
JOHN BRUNNER
发明人
BRUNNER JOHN
分类号
C21D9/04
主分类号
C21D9/04
代理机构
代理人
主权项
地址
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