| 摘要 |
<p>The invention concerns a device for underground reconnaissance by means of a train of rods the lowest of which carries a tool, the rods (7) being articulated on one another and coiled about a reel (1), actuated by an alternating rectilinear movement on a tower (10) and a rotating movement for lowering the rods successively and then re-coiling them on the reel (1).</p> |
