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发明名称
Improvements in classifiers
摘要
申请公布号
GB391240(A)
申请公布日期
1933.04.27
申请号
GB19310031962
申请日期
1931.11.18
申请人
THE DORR COMPANY, INC.
发明人
分类号
B03B5/58
主分类号
B03B5/58
代理机构
代理人
主权项
地址
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