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发明名称
Slide rule
摘要
申请公布号
US2120878(A)
申请公布日期
1938.06.14
申请号
US19350026251
申请日期
1935.06.12
申请人
VALENZUELA JOSE G
发明人
VALENZUELA JOSE G.
分类号
G06G1/12
主分类号
G06G1/12
代理机构
代理人
主权项
地址
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