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经营范围
发明名称
BOREINNRETNING FOR BOREHULL.
摘要
申请公布号
NO800082(A)
申请公布日期
1980.07.17
申请号
NO19800000082
申请日期
1980.01.15
申请人
INTORALA LTD.,
发明人
FERRIER, JOHN ERIC,
分类号
E21B17/07;E21B44/00;F16F9/53;(IPC1-7):E21B/
主分类号
E21B17/07
代理机构
代理人
主权项
地址
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