Quest Bot Automatic Questions Staff member Civil4M Feb 27, 2022 #1 During drilling process for excavation tripple tubecore barrel is used to drill through A Ultra soft rocks B Hard rocks C Both A &B D None of the above The correct Answer Is A A Ultra soft rocks
During drilling process for excavation tripple tubecore barrel is used to drill through A Ultra soft rocks B Hard rocks C Both A &B D None of the above The correct Answer Is A A Ultra soft rocks
