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发明名称
Improvements in or relating to drilling tools
摘要
申请公布号
GB544371(A)
申请公布日期
1942.04.10
申请号
GB19400014852
申请日期
1940.10.03
申请人
ARTHUR HAROLD COOKE;AVIATION DEVELOPMENTS LIMITED
发明人
分类号
B23B51/10
主分类号
B23B51/10
代理机构
代理人
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