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经营范围
发明名称
PROCESS OF PURIFYING INDUSTRIAL SANDS
摘要
申请公布号
CA451234(A)
申请公布日期
1948.09.14
申请号
CAD451234
申请日期
申请人
MINERALS SEPARATION NORTH AMERICAN CORPORATION
发明人
EDWIN B. STOKES
分类号
主分类号
代理机构
代理人
主权项
地址
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