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经营范围
发明名称
Manufacture of manganese dioxide
摘要
申请公布号
US1988799(A)
申请公布日期
1935.01.22
申请号
US19290342679
申请日期
1929.02.25
申请人
KAORU OYAMA
发明人
KATO YOGORO
分类号
C01G45/02
主分类号
C01G45/02
代理机构
代理人
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