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发明名称
RECHENHILFE FUER BRUCHRECHNUNGEN.
摘要
申请公布号
DE1605087(U)
申请公布日期
1950.04.20
申请号
DE194900G0370U
申请日期
1949.12.17
申请人
WILHELM GUENTHER
发明人
WILHELM GUENTHER
分类号
主分类号
代理机构
代理人
主权项
地址
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