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发明名称
Procédé de réalisation de copies hectographiques.
摘要
申请公布号
BE576741(A1)
申请公布日期
1959.07.16
申请号
BE19590576741
申请日期
1959.03.16
申请人
WILHELM RITZERFELD;GERHARD RITZERFELD
发明人
WILHELM RITZERFELD;GERHARD RITZERFELD
分类号
(IPC1-7):B41M
主分类号
(IPC1-7):B41M
代理机构
代理人
主权项
地址
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