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发明名称
Method of separating coal from impurities
摘要
申请公布号
US1870613(A)
申请公布日期
1932.08.09
申请号
US19300423925
申请日期
1930.01.28
申请人
DU PONT FRANCIS I
发明人
PONT FRANCIS I. DU
分类号
B03B5/44
主分类号
B03B5/44
代理机构
代理人
主权项
地址
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