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发明名称
Perfectionnements aux matériaux réfractaires
摘要
申请公布号
FR709978(A)
申请公布日期
1931.08.17
申请号
FRD709978
申请日期
1931.01.26
申请人
HARTFORD-EMPIRE COMPANY
发明人
分类号
C04B33/22;C04B35/18
主分类号
C04B33/22
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