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发明名称
Filtering material and method
摘要
申请公布号
US1954236(A)
申请公布日期
1934.04.10
申请号
US19310540011
申请日期
1931.05.25
申请人
BENJAMIN VICTOR C
发明人
BENJAMIN VICTOR C.
分类号
B01D39/20;B01J20/10
主分类号
B01D39/20
代理机构
代理人
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地址
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