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发明名称
SEGMENT RING FOR SHIELDING WORK
摘要
申请公布号
JPH02217597(A)
申请公布日期
1990.08.30
申请号
JP19890037820
申请日期
1989.02.17
申请人
NIPPON KOKAN RAITO STEEL KK
发明人
ENDO FUSAO
分类号
E21D11/08
主分类号
E21D11/08
代理机构
代理人
主权项
地址
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