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发明名称
Protractor
摘要
申请公布号
US2245321(A)
申请公布日期
1941.06.10
申请号
US19400312419
申请日期
1940.01.04
申请人
BONNEY JACK C
发明人
BONNEY JACK C.
分类号
主分类号
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代理人
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