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经营范围
发明名称
Water softener
摘要
申请公布号
US2050966(A)
申请公布日期
1936.08.11
申请号
US19310515811
申请日期
1931.02.14
申请人
THE DURO COMPANY
发明人
EISENHAUER CHARLES P.
分类号
C02F1/42
主分类号
C02F1/42
代理机构
代理人
主权项
地址
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