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经营范围
发明名称
Automatic valve control means for water softeners
摘要
申请公布号
US2589650(A)
申请公布日期
1952.03.18
申请号
US19470790046
申请日期
1947.12.06
申请人
WOLCOTT JR HERBERT B
发明人
JR. HERBERT B. WOLCOTT,
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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