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发明名称
TREPAN DE FORAGE
摘要
申请公布号
FR2348358(A1)
申请公布日期
1977.11.10
申请号
FR19770010618
申请日期
1977.04.07
申请人
SKF INDUSTRIAL TRADING DEV CY BV
发明人
分类号
E21B10/22;E21B10/20;E21B10/24;(IPC1-7):E21B9/10;F16J15/40
主分类号
E21B10/22
代理机构
代理人
主权项
地址
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