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发明名称
Two-step sulphatizing roasting process
摘要
申请公布号
GB353861(A)
申请公布日期
1931.07.20
申请号
GB19300005363
申请日期
1930.02.18
申请人
FREDERIC AUGUST BRINKER
发明人
分类号
C22B1/02
主分类号
C22B1/02
代理机构
代理人
主权项
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