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发明名称
POWER FEED SYSTEM FOR ROTARY EARTH DRILL
摘要
申请公布号
AU4006485(A)
申请公布日期
1985.11.28
申请号
AU19850040064
申请日期
1985.03.18
申请人
INGERSOLL-RAND CO.
发明人
HANS ZINGL
分类号
E21B19/086;F01B15/02
主分类号
E21B19/086
代理机构
代理人
主权项
地址
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