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经营范围
发明名称
Hydrometer
摘要
申请公布号
US1882321(A)
申请公布日期
1932.10.11
申请号
US19310534254
申请日期
1931.05.01
申请人
VALENTINE HIERGESELL AND DAVID HIERGESELL
发明人
HIERGESELL DAVID
分类号
G01N9/12
主分类号
G01N9/12
代理机构
代理人
主权项
地址
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