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发明名称
ELECTRON BEAM WELDING METHOD FOR HIGH NITROGEN STEEL
摘要
申请公布号
JPH02224880(A)
申请公布日期
1990.09.06
申请号
JP19890045092
申请日期
1989.02.28
申请人
NIPPON STEEL CORP
发明人
OKITA SHIGERU;OGAWA TADAO
分类号
B23K15/00
主分类号
B23K15/00
代理机构
代理人
主权项
地址
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