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经营范围
发明名称
Gravel washer and silt grader
摘要
申请公布号
US2251449(A)
申请公布日期
1941.08.05
申请号
US19390288792
申请日期
1939.08.07
申请人
ANNUN HALVORSON
发明人
HALVORSON ANNUN
分类号
B03B5/26
主分类号
B03B5/26
代理机构
代理人
主权项
地址
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