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发明名称
RECHENTAFEL.
摘要
申请公布号
DE1923697(U)
申请公布日期
1965.09.16
申请号
DE196500H2511U
申请日期
1965.07.08
申请人
FRIEDRICH HELLER
发明人
FRIEDRICH HELLER
分类号
主分类号
代理机构
代理人
主权项
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