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发明名称
Precision square
摘要
申请公布号
US2520571(A)
申请公布日期
1950.08.29
申请号
US19480010694
申请日期
1948.02.25
申请人
SJOBRING NELS P
发明人
SJOBRING NELS P.
分类号
G01B3/06
主分类号
G01B3/06
代理机构
代理人
主权项
地址
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