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发明名称
Method of hardening steel
摘要
申请公布号
US2289138(A)
申请公布日期
1942.07.07
申请号
US19390288246
申请日期
1939.08.03
申请人
UNITED STATES STEEL CORPORATION
发明人
MAYO WARREN H.;ELMENDORF HAROLD J.
分类号
C21D1/70
主分类号
C21D1/70
代理机构
代理人
主权项
地址
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