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发明名称
Rotary disk drill
摘要
申请公布号
US1769371(A)
申请公布日期
1930.07.01
申请号
US19250044774
申请日期
1925.07.20
申请人
BYRON JACKSON CO.
发明人
HOLDAWAY WILLIAM S.
分类号
E21B10/12
主分类号
E21B10/12
代理机构
代理人
主权项
地址
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