miners database | ماشین آلات معدن The 7.6-meter (25-foot)-diameter machine began its journey in September 1994 from a starter tunnel extending 60 meters (196 feet) into Yucca Mountain. To work properly, the machine was positioned inside a tunnel so it could grip the sides of the tunnel and push the cutters into the rock to advance ...
یک پیام ارسال کرد