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发明名称
METHOD FOR MAKING NIOBIUM HIGH-PURITY BY ELECTRON BEAM MELTING
摘要
申请公布号
JPH03247727(A)
申请公布日期
1991.11.05
申请号
JP19900041072
申请日期
1990.02.23
申请人
NIPPON STEEL CORP
发明人
FUKUMOTO SHIGEO;NAKAO RYUJI;FUJI MASAO;TAKEUCHI HIDEMARO
分类号
C22B9/22;C22B34/20
主分类号
C22B9/22
代理机构
代理人
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