| 摘要 |
<p>A pointer (4) intended for attachment to the digging arm (2) of an excavator. The painter is characterized by an elongated arm which can be pivoted on the digging arm (2) by means of a drive means (13) whose driving movements are activated and controlled by the magnetic field generated by an underground cable (5), conduit or like conductor in a manner such as to cause the pointer (5) to point towards the cable (5), conduit or like conductor independently of the position of the digging arm (2). <IMAGE></p> |
