Groups comparison
Drills - 1981 to 2015
Drilling rigs (Heavy equipment drill;Tunnel boring machine) - 1992 to 2015
Large drills attached their own wheels and/or machines due to their size, distance they drill, or stresses they must survive.
Large drills - 2009 to 2015
Larger than a handheld drill, but makes less than a 1 metre hole.
Drilling rigs (Heavy equipment drill;Tunnel boring machine) - 1992 to 2015
Large drills attached their own wheels and/or machines due to their size, distance they drill, or stresses they must survive.
Large drills - 2009 to 2015
Larger than a handheld drill, but makes less than a 1 metre hole.
drills
drills-rig
drills-large