| http://www.w3.org/ns/prov#value | - With this machine, padding material, such as clean dirt, sand or other material free of large rocks and the like may be placed in the ditch 16 with the layer of padding material being substantially the same thickness throughout the length and width of the ditch so that when the pipeline 20 is installed thereon, the pipeline 20 will be protected from underlying rock formations and the like.
|
