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发明名称
Illuminated level
摘要
申请公布号
US2652481(A)
申请公布日期
1953.09.15
申请号
US19500193076
申请日期
1950.10.31
申请人
HALL ARTHUR H
发明人
HALL ARTHUR H.
分类号
G01C9/32
主分类号
G01C9/32
代理机构
代理人
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