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发明名称
Heat tempering and hardening method for metals
摘要
申请公布号
US2236810(A)
申请公布日期
1941.04.01
申请号
US19380193009
申请日期
1938.02.28
申请人
PENWELD CORPORATION
发明人
WATSON GLENN W.
分类号
C21D1/40
主分类号
C21D1/40
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代理人
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