if you are refering to the lids that you see on the streets its that the lid will not fall into the hole, also most piping is circular
They were roman They were sewers They weren't in the shape of a teddy They were sewers
The sewers which are under the concrete slab
Rob A. Kleijwegt has written: 'On sediment transport in circular sewers with non-cohesive deposits' -- subject(s): Sediment transport, Fluid dynamics, Sewerage
Because they don't like sewers.
Sewers - album - was created in 2008.
Sewers of Gold was created in 1979.
Tagalog Translation of SEWERS: mga mananahi
The Romans built sewers for the reasons one builds sewers: to channel and dispose of waste and for hygiene.
The duration of Sewers of Gold is 1.7 hours.
Pleasures Pave Sewers was created in 1999.
Four sewage disposal types include typical septic systems, sanitary sewers, storm sewers, and combined sewers.
Sir Joseph Bazalgette is the man who invented the Victorian sewers.