mechanically driven drill and caterpillar truck

area autumn backlog borer boring building built caterpillar construction crawler crosscountry device dredging drifter drill drilling drillingrig drillpipes driven engine enterprise exploitation exploratory exploring felling forest ground hole jumbo land large largescale logged machine major mechanically minidrilling mounting opening operation pioneering planchet plot project prospecting rainy research rig rockdrill rod sawn selfpropelled setup site soil stem string surveying texture time tracked trees truck vehicle work