Giant geotechnical drilling rig on treads.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...k_fullsize.jpg
Previously:
Giant core barrel for drilling foundations - video and photo
Antique Cincinnati Bickford radial arm drill press - photo
Beam drill - GIF
Shaft drill - GIF
Oil drilling rig walking - GIF
Friction welding drill pipe for oil exploration
manual rock drill
Drilling rig derrick installation - photo
Revolving drill head - photos and video
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