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发明名称
VACUUM REFINING METHOD
摘要
申请公布号
JPH02305917(A)
申请公布日期
1990.12.19
申请号
JP19890128154
申请日期
1989.05.22
申请人
DAIDO STEEL CO LTD
发明人
NAGUMO TSUTOMU;SUZUKI TADAKIMI
分类号
C22B9/04;C21C7/10
主分类号
C22B9/04
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代理人
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