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发明名称
Illuminated spirit level
摘要
申请公布号
US2790069(A)
申请公布日期
1957.04.23
申请号
US19540470292
申请日期
1954.11.22
申请人
ALEXANDER GEORGE G
发明人
ALEXANDER GEORGE G.
分类号
G01C9/32
主分类号
G01C9/32
代理机构
代理人
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