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发明名称
Slide rules
摘要
申请公布号
US2968438(A)
申请公布日期
1961.01.17
申请号
US19560602967
申请日期
1956.08.09
申请人
A. W. FABER-CASTELL
发明人
BACHMANN HARALD;TEGTMEYER HEINRICH
分类号
G06G1/06
主分类号
G06G1/06
代理机构
代理人
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