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发明名称
RECHENSETZBRETT ZUR VERANSCHAULICHUNG DES ZEHNERSYSTEMS.
摘要
申请公布号
DE1892827(U)
申请公布日期
1964.05.14
申请号
DE196300B5924U
申请日期
1963.12.17
申请人
GOTTHARD BALDAUF;MARGARETE WEIHER
发明人
GOTTHARD BALDAUF;MARGARETE WEIHER
分类号
主分类号
代理机构
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