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发明名称
Perfectionnements apportés aux compositions métalliques dures et à leurs procédés de fabrication
摘要
申请公布号
FR37695(E)
申请公布日期
1931.01.14
申请号
FRD37695
申请日期
1929.09.26
申请人
COMPAGNIE FRANCAISE POUR L'EXPLOITATION DES PROCEDES THOMSON-HOUSTON
发明人
分类号
C22C1/05
主分类号
C22C1/05
代理机构
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