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经营范围
发明名称
Process for beneficiating diatomaceous earth ores
摘要
申请公布号
US3375922(A)
申请公布日期
1968.04.02
申请号
US19650478296
申请日期
1965.08.09
申请人
GREFCO, INC.
发明人
MARTIN CARL C.;GOODHUE DON T.;RENGEL DOROTHY M.
分类号
B01J20/14
主分类号
B01J20/14
代理机构
代理人
主权项
地址
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