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发明名称
Level compass
摘要
申请公布号
US2542561(A)
申请公布日期
1951.02.20
申请号
US19470774076
申请日期
1947.09.15
申请人
OLEJNICZAK STEPHEN J
发明人
OLEJNICZAK STEPHEN J.
分类号
B43L9/04
主分类号
B43L9/04
代理机构
代理人
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地址
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