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发明名称
Spirit level
摘要
申请公布号
US1920892(A)
申请公布日期
1933.08.01
申请号
US19310577078
申请日期
1931.11.24
申请人
ROGERS PHILLIP H
发明人
ROGERS PHILLIP H.
分类号
G01C9/28
主分类号
G01C9/28
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