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发明名称
Improvements in the drilling of holes by spark erosion
摘要
申请公布号
GB860609(A)
申请公布日期
1961.02.08
申请号
GB19580017019
申请日期
1958.05.28
申请人
ROLLS-ROYCE LIMITED
发明人
HALLSWORTH RAYMOND THOMAS;HOLROYD IRVIN
分类号
B23H9/14
主分类号
B23H9/14
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代理人
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地址
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