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发明名称
JET DRILLING BIT
摘要
申请公布号
AU556885(B2)
申请公布日期
1986.11.20
申请号
AU19830022786
申请日期
1983.12.22
申请人
CHARBONNAGES DE FRANCE
发明人
SERGE IPPOLITO;GEORGES AUGUSTIN CAGNIONCLE
分类号
E21B7/18;E21B10/04;E21B10/54;E21B10/58;E21B10/60;(IPC1-7):E21B7/18
主分类号
E21B7/18
代理机构
代理人
主权项
地址
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