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发明名称
Etching zinc plates
摘要
申请公布号
US1994500(A)
申请公布日期
1935.03.19
申请号
US19320649733
申请日期
1932.12.31
申请人
THE GRASSELLI CHEMICAL COMPANY
发明人
BOLLER ERNEST R.
分类号
C23F1/30
主分类号
C23F1/30
代理机构
代理人
主权项
地址
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