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发明名称
Triangle-protractor
摘要
申请公布号
US2070675(A)
申请公布日期
1937.02.16
申请号
US19350018307
申请日期
1935.04.26
申请人
NIEMEYER JAMES C
发明人
NIEMEYER JAMES C.
分类号
G01C1/00;G01C21/20
主分类号
G01C1/00
代理机构
代理人
主权项
地址
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