| 摘要 |
<p>Rock bolting device comprising a swingable bolting unit (2) which carries a conduit (4) for transport of hardenable mass to a drill hole (3). The conduit is surrounded by a tube (5) in which a thickened part (6) of the conduit is movable to-and-fro under sealing cooperation with the tube. Through this the conduit (4) can be fed towards or away from the mouth (7) of the drill hole (3). <IMAGE></p> |
