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发明名称
Process for the manufacture of rails with hardened heads
摘要
申请公布号
US1828325(A)
申请公布日期
1931.10.20
申请号
US19280291036
申请日期
1928.07.07
申请人
HEINRICH KURZ
发明人
KURZ HEINRICH
分类号
C21D9/04
主分类号
C21D9/04
代理机构
代理人
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地址
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