发明名称 DRILLING APPARATUS, METHOD, AND SYSTEM
摘要 <p>A method of supporting a substrate includes inserting a rock bolt into a hole and using the rock bolt to form a groove in a wall of the hole when the rock bolt is inserted therein. The rock bolt is caused to interact with the groove in such a way that the rock bolt is secured in the hole at least in part by the interaction.</p>
申请公布号 CA2536237(A1) 申请公布日期 2005.03.03
申请号 CA20042536237 申请日期 2004.08.18
申请人 UTD, INCORPORATED 发明人 HILL, JOHN L., III;SHENHAR, JORAM;BRENNAN, MIKE;KOCH, DAVID;DOLGIN, BENJAMIN;GIRALDO, LUIS B.;LOMBARDO, MARK
分类号 E21B10/44;E21D21/00 主分类号 E21B10/44
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