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发明名称
Circle indicator
摘要
申请公布号
US2401029(A)
申请公布日期
1946.05.28
申请号
US19440532305
申请日期
1944.04.22
申请人
THOMPSON MALCOLM H
发明人
THOMPSON MALCOLM H.
分类号
G01C1/06
主分类号
G01C1/06
代理机构
代理人
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