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发明名称
Self computing leveling rod
摘要
申请公布号
US1811859(A)
申请公布日期
1931.06.30
申请号
US19280266507
申请日期
1928.04.02
申请人
MILLS CHESTER H
发明人
MILLS CHESTER H.
分类号
G01C15/06
主分类号
G01C15/06
代理机构
代理人
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