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发明名称
HARDENING HEAD
摘要
申请公布号
JPH03158418(A)
申请公布日期
1991.07.08
申请号
JP19890295793
申请日期
1989.11.14
申请人
NKK CORP
发明人
NARAHARA TAKEFUMI;TAKAHASHI KAZUTAKA;YAMADA IKUO
分类号
C21D1/667;C21D9/08
主分类号
C21D1/667
代理机构
代理人
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地址
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