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发明名称
Rail treatment method
摘要
申请公布号
US2070889(A)
申请公布日期
1937.02.16
申请号
US19330660544
申请日期
1933.03.13
申请人
WELDING SERVICE, INC.
发明人
FRICKEY ROYAL E.;KALENBORN ARION S.
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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