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发明名称
Sewage treatment
摘要
申请公布号
US2258398(A)
申请公布日期
1941.10.07
申请号
US19390297289
申请日期
1939.09.30
申请人
OSCAR WARD
发明人
WARD OSCAR
分类号
C02F3/04
主分类号
C02F3/04
代理机构
代理人
主权项
地址
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