Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) OKAMOTO Ayaka and ARAO Shinji and HIRATSUKA Shunsuke and KUSUDA Tetsuya,ENERGY LOSS CHARACTERISTIC OF FOUR-WAY CIRCULAR MANHOLES AT CROSSROADS,"Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)",2185-467X,Japan Society of Civil Engineers,2020,76,2,I_925-I_930,https://cir.nii.ac.jp/crid/1390008754689797888,https://doi.org/10.2208/jscejhe.76.2_i_925