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经营范围
发明名称
Rail heating apparatus
摘要
申请公布号
US1992943(A)
申请公布日期
1935.03.05
申请号
US19330666528
申请日期
1933.04.17
申请人
WELDING SERVICE, INC.
发明人
FRICKEY ROYAL E.;KALENBORN ARION S.
分类号
C21D1/09;C21D9/04;E01B31/18
主分类号
C21D1/09
代理机构
代理人
主权项
地址
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