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发明名称
Roller-cutter mounting
摘要
申请公布号
US1779587(A)
申请公布日期
1930.10.28
申请号
US19270182484
申请日期
1927.04.09
申请人
REED ROLLER BIT COMPANY
发明人
CHILDS WILLIAM L.
分类号
E21B10/20
主分类号
E21B10/20
代理机构
代理人
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地址
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