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经营范围
发明名称
Improvements in or relating to boring holes
摘要
申请公布号
GB945201(A)
申请公布日期
1963.12.23
申请号
GB19620005597
申请日期
1962.02.14
申请人
RAYDON AYERS LINES
发明人
分类号
E21B7/00
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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