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发明名称
Multiple line work performing apparatus
摘要
申请公布号
GB2183274(A)
申请公布日期
1987.06.03
申请号
GB19860026820
申请日期
1986.11.10
申请人
* CAMCO INCORPORATED
发明人
ARTHUR JOHN * MORRIS
分类号
E21B4/18;E21B23/00;E21B23/01;E21B23/10;(IPC1-7):E21B23/00
主分类号
E21B4/18
代理机构
代理人
主权项
地址
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