Machine that boring thousands of feet in hard rock in a few hours / Boring complete process

Machine that boring thousands of feet in hard rock in a few hours / New technique #machine #boring #thousands #feet #hard #rock #fewseconds #hours #new #tecnique #tecnology #amazing #driver Boring was done with a compressor machine, in which 70 feet of water came and 300 feet of boring was done. There was a lot of water on which the motor was running 24 times