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发明名称
Perfectionnements à la préparation du noir de fumée
摘要
申请公布号
FR839458(A)
申请公布日期
1939.04.04
申请号
FRD839458
申请日期
1938.06.17
申请人
COLUMBIAN CARBON COMPANY
发明人
分类号
C09C1/56
主分类号
C09C1/56
代理机构
代理人
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