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Roman dropshaft in operation: Recret model (Aug. 1998) Regime R2: at large flow rates, usual operation in modern sewer dropshaft (photo dc/h = 0.22)
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[Ref.: CHANSON 2000, Am Jl Archaeology, CHANSON 2002, Jl of Hyd. Res.] © Hubert Chanson, Dept. of Civil Engineering, University of Queensland, Australia |