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经营范围
发明名称
Process of softening water
摘要
申请公布号
US1823605(A)
申请公布日期
1931.09.15
申请号
US19300423270
申请日期
1930.01.24
申请人
HOOVER CHARLES P
发明人
HOOVER CHARLES P.
分类号
C02F5/02
主分类号
C02F5/02
代理机构
代理人
主权项
地址
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