发明名称 METHOD AND EQUIPMENT FOR ROCK DRILLING
摘要 <p>A drilling equipment and a method is intended for horizontally boring rocks with a low bench height. The drilling equipment can be used as an accessory to an ordinary dredger or the like. The whole trilling equipment is arranged to turn in a plane parallel to the plane of the brackets of the dredger's boom, and the drilling machine itself together with its drillpropulsion unit is arranged to turn in a plane perpendicular to said brackets plane. These turnings are preferentially effected by hydraulic power from the dredger.</p>
申请公布号 CA1227787(A) 申请公布日期 1987.10.06
申请号 CA19840458318 申请日期 1984.07.06
申请人 JCC JOHNSON CONSTRUCTION COMPANY AB 发明人 SJAELANDER, BO A.
分类号 E21B7/02;E21B15/04;(IPC1-7):E21C11/00 主分类号 E21B7/02
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