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发明名称
Bubble level
摘要
申请公布号
US2750677(A)
申请公布日期
1956.06.19
申请号
US19510262605
申请日期
1951.12.20
申请人
ARMIN WIRTH
发明人
WIRTH ARMIN
分类号
G01C9/32
主分类号
G01C9/32
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