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经营范围
发明名称
Combination protractor and compass
摘要
申请公布号
USD250177(S1)
申请公布日期
1978.11.07
申请号
US05/775567
申请日期
1977.03.07
申请人
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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