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发明名称
Precision measuring instrument
摘要
申请公布号
US1822662(A)
申请公布日期
1931.09.08
申请号
US19260150400
申请日期
1926.11.24
申请人
PRECISION SCIENTIFIC COMPANY
发明人
LETSCH EUGENE
分类号
G01N3/42
主分类号
G01N3/42
代理机构
代理人
主权项
地址
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