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发明名称
Vernier
摘要
申请公布号
US2212884(A)
申请公布日期
1940.08.27
申请号
US19390291653
申请日期
1939.08.24
申请人
OTTO REITZ
发明人
POLASIK FLOYD J.
分类号
G01B3/20
主分类号
G01B3/20
代理机构
代理人
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