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发明名称
Improvements relating to chucks for drilling
摘要
申请公布号
GB947096(A)
申请公布日期
1964.01.22
申请号
GB19610029851
申请日期
1961.08.18
申请人
ENGLISH DRILLING EQUIPMENT COMPANY LIMITED;FRANK WALMSLEY
发明人
分类号
E21B3/04
主分类号
E21B3/04
代理机构
代理人
主权项
地址
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