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发明名称
Improvements relating to spirit levels
摘要
申请公布号
GB546068(A)
申请公布日期
1942.06.25
申请号
GB19410007715
申请日期
1941.06.18
申请人
GEORGE H. ALEXANDER MACHINERY LIMITED;EDGAR DALE BALL
发明人
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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