掘进机掘进
tunneling of heading machine
土压平衡顶管掘进技术
pipe jacking EPB tunneling technology
土压平衡顶管机
earth pressure balance pipe-jacking machine
自动轧管机顶头
automatical pipe rolling mill plug
TB880E型岩石掘进机
Model TB880E rock tunneler
TBM掘进机
TBM digging machine
TBM
TBM mechanical boring machine
敞开式全断面岩石掘进机
Open type whole section rock tunneler