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摘要
申请公布号
US1991187(A)
申请公布日期
1935.02.12
申请号
US19330703700
申请日期
1933.12.23
申请人
ZAHM & NAGEL CO. INC.
发明人
ZAHM EDWARD
分类号
B01D25/12;B01D29/00;B01D35/00;B01D37/02
主分类号
B01D25/12
代理机构
代理人
主权项
地址
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