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发明名称
Apparatus for measuring the concentration of vitamin a
摘要
申请公布号
US2265357(A)
申请公布日期
1941.12.09
申请号
US19400346097
申请日期
1940.07.18
申请人
NATIONAL OIL PRODUCTS COMPANY
发明人
DEMAREST BEAUMONT
分类号
G01N21/35
主分类号
G01N21/35
代理机构
代理人
主权项
地址
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