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发明名称
Procédé de préparation de charbon à électrodes
摘要
申请公布号
FR712972(A)
申请公布日期
1931.10.16
申请号
FRD712972
申请日期
1931.03.10
申请人
VERKAUFSVEREINIGUNG FUR TEERERZEUGNISSE G.M.B.H.
发明人
分类号
C01B31/00;G01G1/00
主分类号
C01B31/00
代理机构
代理人
主权项
地址
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