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发明名称
Spirit level
摘要
申请公布号
US2317715(A)
申请公布日期
1943.04.27
申请号
US19420445935
申请日期
1942.06.05
申请人
GEORGE H. ALEXANDER MACHINERY LIMITED
发明人
BALL EDGAR DALE
分类号
G01C9/28
主分类号
G01C9/28
代理机构
代理人
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地址
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