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经营范围
发明名称
Beneficiation of coal by flotation
摘要
申请公布号
US2633240(A)
申请公布日期
1953.03.31
申请号
US19500196077
申请日期
1950.11.16
申请人
HERCULES POWDER COMPANY
发明人
BISHOP WILLIAM T.
分类号
B03D1/02
主分类号
B03D1/02
代理机构
代理人
主权项
地址
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