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发明名称
Rechtwinkeliges Zeichendreieck
摘要
申请公布号
DE585040(C)
申请公布日期
1933.09.28
申请号
DE1931R083566D
申请日期
1931.12.15
申请人
LUDWIG RUCKERT;CHRISTOF KAMMERER
发明人
分类号
B43L7/027
主分类号
B43L7/027
代理机构
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