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发明名称
Auger blade holder and blades therefor
摘要
申请公布号
GB2246379(A)
申请公布日期
1992.01.29
申请号
GB19910014364
申请日期
1991.07.03
申请人
* N U B ENGINEERING LIMITED
发明人
WILLIAM MURRAY * USHER
分类号
E21B10/44
主分类号
E21B10/44
代理机构
代理人
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