| 摘要 |
<p>One or more markers are dispensed on ground, pavement or other surface in a dig area to be excavated or disturbed during excavation activities, so as to provide a visual indication of a presence or an absence of one or more underground utilities in the dig area. One or more signals are wirelessly transmitted in response to the dispensing of the one or more markers, wherein the signal(s) represent(s) first data relating to a location at which the marker(s) is/are dispensed, and/or one or more characteristics of the dispensed marker(s).</p> |
