coefficient of foundation ditch‘s rebound
Construction of the deep foundation ditch
deep foundation ditch combination supporting schem
Excavation of foundation ditch
excavation of the foundation ditch
foundation ditch back silting
Foundation ditch checkout
Foundation ditch enclosing
foundation ditch project
Foundation Ditch Support
Foundation ditch unwatering
Foundation-Ditch Excavation
project of foundation ditch under railway
temporary foundation ditch
underrail foundation；sub-rail foundation；sub-rail track bed
Double channel ditch (W-type ditch)
weeper drain；weep drain；drainage ditch；drain ditch
Two Foundation of mathematics