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发明名称
Complete sewage treatment plant with submerged contact aerators
摘要
申请公布号
US1820977(A)
申请公布日期
1931.09.01
申请号
US19270232169
申请日期
1927.11.09
申请人
KARL IMHOFF
发明人
IMHOFF KARL
分类号
C02F3/28;C02F3/30
主分类号
C02F3/28
代理机构
代理人
主权项
地址
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