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经营范围
发明名称
Foundry sand reclaiming system and method
摘要
申请公布号
US2420392(A)
申请公布日期
1947.05.13
申请号
US19420469662
申请日期
1942.12.21
申请人
HERBERT S. SIMPSON
发明人
CHRISTENSEN ALFRED C.;DVORAK JAMES J.
分类号
B22C5/18
主分类号
B22C5/18
代理机构
代理人
主权项
地址
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