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经营范围
发明名称
MINERAL MATTER BLEACHING METHOD
摘要
申请公布号
CA369928(A)
申请公布日期
1937.11.16
申请号
CAD369928
申请日期
申请人
THE VIRGINIA SMELTING COMPANY
发明人
FREDERICK W. BINNS
分类号
主分类号
代理机构
代理人
主权项
地址
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