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发明名称
Roller bit
摘要
申请公布号
GB845355(A)
申请公布日期
1960.08.24
申请号
GB19590013613
申请日期
1959.04.21
申请人
REED ROLLER BIT COMPANY
发明人
PETER ROBERT GATES
分类号
E21B10/16
主分类号
E21B10/16
代理机构
代理人
主权项
地址
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