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经营范围
发明名称
Improved protractor
摘要
申请公布号
GB339980(A)
申请公布日期
1930.12.11
申请号
GB19290027679
申请日期
1929.09.11
申请人
HORACE EDWIN BRIMFIELD
发明人
分类号
G01B3/56;G01C1/00
主分类号
G01B3/56
代理机构
代理人
主权项
地址
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