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摘要
申请公布号
US1977174(A)
申请公布日期
1934.10.16
申请号
US19330694252
申请日期
1933.10.19
申请人
VICTOR R. HEFTLER
发明人
CRAWFORD MATTHEW O.
分类号
B01D29/46
主分类号
B01D29/46
代理机构
代理人
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