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发明名称
Method of reforming worn rail joint bars
摘要
申请公布号
US1836032(A)
申请公布日期
1931.12.15
申请号
US19310536375
申请日期
1931.05.11
申请人
MCKENNA PROCESS COMPANY
发明人
LANGFORD GEORGE
分类号
B21K9/00
主分类号
B21K9/00
代理机构
代理人
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