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发明名称
Examination paper grading apparatus
摘要
申请公布号
US2694266(A)
申请公布日期
1954.11.16
申请号
US19540404662
申请日期
1954.01.18
申请人
ROEDER WESLEY S
发明人
ROEDER WESLEY S.
分类号
B26F1/02
主分类号
B26F1/02
代理机构
代理人
主权项
地址
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