A robot that can dig quickly and deeply into mud or wet sand could one day help lay underwater cables, dig up and detonate underwater mines, or anchor machines to the seafloor, researchers say. The ...
There is geojetting which highly pressurized water to bore geothermal tunnels about 5 times faster than conventional tunneling (about 25 meters per day for geojetting.) Geojetting can dig three 50 ...
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