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发明名称
Method of and material for filtration
摘要
申请公布号
US1981877(A)
申请公布日期
1934.11.27
申请号
US19320616960
申请日期
1932.06.13
申请人
ELLA L. PIERCE
发明人
PIERCE GUY C.
分类号
B01J20/14
主分类号
B01J20/14
代理机构
代理人
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地址
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