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发明名称
Method of making hard metal alloys
摘要
申请公布号
US2176802(A)
申请公布日期
1939.10.17
申请号
US19380203196
申请日期
1938.04.20
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
ROMP JOHAN
分类号
C22C1/05
主分类号
C22C1/05
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