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发明名称
Procédé pour la fabrication d'outils et d'ustensiles en oxyde d'aluminium
摘要
申请公布号
BE383686(A1)
申请公布日期
1931.11.30
申请号
BE19310383686
申请日期
1931.10.24
申请人
SIEMENS AG
发明人
SIEMENS AG
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主分类号
代理机构
代理人
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