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发明名称
Grading machine
摘要
申请公布号
US2146217(A)
申请公布日期
1939.02.07
申请号
US19360092777
申请日期
1936.07.27
申请人
NORTH AMERICAN HOLDING CORPORATION
发明人
JOHNSTON JAMES W.
分类号
G01B5/06
主分类号
G01B5/06
代理机构
代理人
主权项
地址
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