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发明名称
DOPPEL-SCHREIB- BZW. MALSTIFT MIT VERSCHIEDENFARBIGEN EINSATZMINEN.
摘要
申请公布号
DE1711987(U)
申请公布日期
1955.12.01
申请号
DE195300R6002U
申请日期
1953.02.21
申请人
EDUARD ROLAND
发明人
EDUARD ROLAND
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主分类号
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