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发明名称
Apparatus for casehardening drill rods
摘要
申请公布号
US2591339(A)
申请公布日期
1952.04.01
申请号
US19480068355
申请日期
1948.12.30
申请人
ATLAS STEELS LIMITED
发明人
DAVIS ROY H.
分类号
C21D1/10;H05B6/02
主分类号
C21D1/10
代理机构
代理人
主权项
地址
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