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发明名称
Core drill
摘要
申请公布号
US1883321(A)
申请公布日期
1932.10.18
申请号
US19280296215
申请日期
1928.07.30
申请人
SULLIVAN MACHINERY COMPANY
发明人
ALLEN MORRIS C.
分类号
E21B10/48
主分类号
E21B10/48
代理机构
代理人
主权项
地址
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