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发明名称
Method of reconditioning used sand
摘要
申请公布号
US2508857(A)
申请公布日期
1950.05.23
申请号
US19470728967
申请日期
1947.02.15
申请人
THE DOW CHEMICAL COMPANY
发明人
CHAMBERLIN MARSHALL V.
分类号
B22C1/22;B22C5/04
主分类号
B22C1/22
代理机构
代理人
主权项
地址
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