overburden
131Sinkhole — For the War of 1812 battle, see Battle of the Sink Hole. For the type of wallet, see Wallet band#Swallet. A sink hole in Oman …
132Slurry wall — excavator A set of Slurry wall guide walls before excav …
131Sinkhole — For the War of 1812 battle, see Battle of the Sink Hole. For the type of wallet, see Wallet band#Swallet. A sink hole in Oman …
132Slurry wall — excavator A set of Slurry wall guide walls before excav …