|
|
||
|
Roman dropshaft in operation: Valdepuentes model (90-degree angled outlet) |
||
|
|
||
|
[Ref.: CHANSON 2000, Am Jl Archaeology, CHANSON 2002, Jl of Hyd. Res.] © Hubert Chanson, Dept. of Civil Engineering, University of Queensland, Australia |