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经营范围
发明名称
Prevention of scale deposits in steam generating plants
摘要
申请公布号
US2226592(A)
申请公布日期
1940.12.31
申请号
US19380197007
申请日期
1938.03.19
申请人
ROLAND STERN
发明人
STERN ROLAND
分类号
主分类号
代理机构
代理人
主权项
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