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经营范围
发明名称
Sewage aerating apparatus
摘要
申请公布号
US2023924(A)
申请公布日期
1935.12.10
申请号
US19330704537
申请日期
1933.12.29
申请人
发明人
分类号
B01F3/04;C02F3/20;G04B19/32
主分类号
B01F3/04
代理机构
代理人
主权项
地址
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